Annual report pursuant to Section 13 and 15(d)

Postretirement Benefits (Details)

v2.4.0.6
Postretirement Benefits (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Postretirement Benefits [Abstract]      
Pension and other postretirement benefit expense $ 30.9 $ 25.0 $ 24.0
Contributions to multiemployer plans 0.5 0.3 0.4
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, beginning 740.4 [1]    
Fair value of plan assets, ending 795.7 [2] 740.4 [1]  
Net Actuarial Losses [Abstract]      
Percentage of benefit obligation or market value of assets, over which actuarial gains and losses are subject to amortization (in hundredths)   10.00%  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Amortization of prior service costs (credits) for former/inactive employees 1.3 1.3  
Estimated pretax prior service credit in Accumulated other comprehensive income (loss) expected to be recognized for former/inactive employees 1.3    
Fair value of plan assets 795.7 [2] 740.4 [1]  
Expected Benefit Payments [Abstract]      
Company contributions expected to be made in 2012 to the unfunded benefit plans 4.0    
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]      
Projected benefit obligation 1,319.3 1,214.2  
Accumulated benefit obligation 1,319.3 1,214.2  
Fair value of plan assets 795.7 740.4  
Funded status (in hundredths) 60.00% 61.00%  
Unfunded, nonqualified pension plan projected and accumulated benefit obligations included in funded status of the Company's pension plans 43.1 42.0  
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]      
Health care cost trend rate for next year (in hundredths) 7.60% 7.80%  
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) (in hundredths) 4.50% 4.50%  
Year rate reaches the ultimate trend rate 2028 2028  
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]      
Effect on total service and interest cost, increase 0.1    
Effect on total service and interest cost, decrease (0.1)    
Effect on accumulated postretirement benefit obligation, increase 1.5    
Effect on accumulated postretirement benefit obligation, decrease (1.3)    
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]      
United States (in hundredths) 46.00% 54.00%  
International (in hundredths) 8.00% 11.00%  
Fixed-income securities (in hundredths) 42.00% 33.00%  
Short-term investments (in hundredths) 4.00% 2.00%  
Total (in hundredths) 100.00% 100.00%  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
United States (in hundredths) 45.00%    
International (in hundredths) 10.00%    
Fixed-income securities (in hundredths) 45.00%    
Short-term investments (in hundredths) 0.00%    
Total (in hundredths) 100.00%    
Fair Value, Inputs, Level 1 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 75.7 [2] 24.9 [1]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 75.7 [2] 24.9 [1]  
Fair Value, Inputs, Level 2 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 724.4 [2] 715.7 [1]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 724.4 [2] 715.7 [1]  
Fair Value, Inputs, Level 3 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, beginning   87.9  
Fair value of plan assets, ending 0 [2] 0.9 [1]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 0 [2] 0.9 [1]  
Actual Return on Plan Assets [Abstract]      
Unrealized gains (losses)   18.8  
Realized gains (losses)   (21.4)  
Purchases, sales and settlements   (84.1)  
Transfers in/(out)   (0.3)  
Fair Value [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 800.1 [2] 741.5 [1]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 800.1 [2] 741.5 [1]  
Short-term Investments [Member] | Fair Value, Inputs, Level 1 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 0.1 [2] 0 [1]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 0.1 [2] 0 [1]  
Short-term Investments [Member] | Fair Value, Inputs, Level 2 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 28.8 [2] 18.3 [1]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 28.8 [2] 18.3 [1]  
Short-term Investments [Member] | Fair Value, Inputs, Level 3 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 0 [2] 0 [1]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 0 [2] 0 [1]  
Short-term Investments [Member] | Fair Value [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 28.9 [2] 18.3 [1]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 28.9 [2] 18.3 [1]  
International Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 0 [2],[3] 0 [1],[4]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 0 [2],[3] 0 [1],[4]  
International Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 65.4 [2],[3] 82.6 [1],[4]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 65.4 [2],[3] 82.6 [1],[4]  
International Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 0 [2],[3] 0 [1],[4]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 0 [2],[3] 0 [1],[4]  
International Equity Securities [Member] | Fair Value [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 65.4 [2],[3] 82.6 [1],[4]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 65.4 [2],[3] 82.6 [1],[4]  
US Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 0 [2],[3] 0.3 [1],[4]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 0 [2],[3] 0.3 [1],[4]  
US Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 367.2 [2],[3] 393.2 [1],[4]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 367.2 [2],[3] 393.2 [1],[4]  
US Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, beginning   2.3  
Fair value of plan assets, ending 0 [2],[3] 0 [1],[4]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 0 [2],[3] 0 [1],[4]  
Actual Return on Plan Assets [Abstract]      
Unrealized gains (losses)   0.3  
Realized gains (losses)   0  
Purchases, sales and settlements   (2.3)  
Transfers in/(out)   (0.3)  
US Equity Securities [Member] | Fair Value [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 367.2 [2],[3] 393.5 [1],[4]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 367.2 [2],[3] 393.5 [1],[4]  
Government debt securities [Member] | Fair Value, Inputs, Level 1 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 75.6 [2],[5] 24.6 [1],[6]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 75.6 [2],[5] 24.6 [1],[6]  
Government debt securities [Member] | Fair Value, Inputs, Level 2 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 38.0 [2],[5] 25.2 [1],[6]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 38.0 [2],[5] 25.2 [1],[6]  
Government debt securities [Member] | Fair Value, Inputs, Level 3 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 0 [2],[5] 0 [1],[6]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 0 [2],[5] 0 [1],[6]  
Government debt securities [Member] | Fair Value [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 113.6 [2],[5] 49.8 [1],[6]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 113.6 [2],[5] 49.8 [1],[6]  
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 0 [2],[7] 0 [1],[7]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 0 [2],[7] 0 [1],[7]  
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 98.5 [2],[7] 9.1 [1],[7]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 98.5 [2],[7] 9.1 [1],[7]  
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 0 [2],[7] 0 [1],[7]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 0 [2],[7] 0 [1],[7]  
Corporate Debt Securities [Member] | Fair Value [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 98.5 [2],[7] 9.1 [1],[7]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 98.5 [2],[7] 9.1 [1],[7]  
Commingled Funds [Member] | Fair Value, Inputs, Level 1 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 0 [2],[8] 0 [1],[9]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 0 [2],[8] 0 [1],[9]  
Commingled Funds [Member] | Fair Value, Inputs, Level 2 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 126.5 [2],[8] 186.7 [1],[9]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 126.5 [2],[8] 186.7 [1],[9]  
Commingled Funds [Member] | Fair Value, Inputs, Level 3 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 0 [2],[8] 0 [1],[9]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 0 [2],[8] 0 [1],[9]  
Commingled Funds [Member] | Fair Value [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending 126.5 [2],[8] 186.7 [1],[9]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets 126.5 [2],[8] 186.7 [1],[9]  
Real Estate [Member] | Fair Value, Inputs, Level 1 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending   0 [1],[10]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets   0 [1],[10]  
Real Estate [Member] | Fair Value, Inputs, Level 2 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending   0 [1],[10]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets   0 [1],[10]  
Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, beginning 0.9 [1],[10] 79.8  
Fair value of plan assets, ending   0.9 [1],[10]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets   0.9 [1],[10]  
Actual Return on Plan Assets [Abstract]      
Unrealized gains (losses)   8.3  
Realized gains (losses)   (11.2)  
Purchases, sales and settlements (0.9) (76.0)  
Transfers in/(out)   0  
Real Estate [Member] | Fair Value [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending   0.9 [1],[10]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets   0.9 [1],[10]  
Other Investments [Member] | Fair Value, Inputs, Level 1 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending   0 [1],[11]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets   0 [1],[11]  
Other Investments [Member] | Fair Value, Inputs, Level 2 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending   0.6 [1],[11]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets   0.6 [1],[11]  
Other Investments [Member] | Fair Value, Inputs, Level 3 [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, beginning   5.8  
Fair value of plan assets, ending   0 [1],[11]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets   0 [1],[11]  
Actual Return on Plan Assets [Abstract]      
Unrealized gains (losses)   10.2  
Realized gains (losses)   (10.2)  
Purchases, sales and settlements   (5.8)  
Transfers in/(out)   0  
Other Investments [Member] | Fair Value [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending   0.6 [1],[11]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets   0.6 [1],[11]  
Other Pension Plan Assets [Member] | Fair Value [Member]
     
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, ending (4.4) [12],[2] (1.1) [1],[13]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Fair value of plan assets (4.4) [12],[2] (1.1) [1],[13]  
Pension Plans [Member]
     
Net Periodic Benefit Cost [Abstract]      
Service cost 1.1 1.1 9.2
Interest cost 62.4 64.8 66.4
Expected return on plan assets (53.3) (49.5) (49.4)
Amortization of prior service costs (credits) 0.4 0.4 3.6
Amortization of net actuarial loss 21.3 22.2 52.5
Curtailment loss 0.3 0.1 12.4
Settlement loss 0 0 1.5
Net pension and other benefit costs 32.2 39.1 96.2
Change in Benefit Obligations [Roll Forward]      
Benefit obligation, beginning balance 1,214.2 1,143.8  
Service cost 1.1 1.1 9.2
Interest cost 62.4 64.8 66.4
Participant contributions 0 0  
Actuarial (gains) losses 113.1 74.8  
Benefit payments (71.5) (70.4)  
Plan amendments 0 0.1  
Benefit obligation, ending balance 1,319.3 1,214.2 1,143.8
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, beginning 740.4 682.2  
Actual return on plan assets 47.2 91.2  
Employer contributions 79.6 37.4  
Participant contributions 0 0  
Benefit payments (71.5) (70.4)  
Fair value of plan assets, ending 795.7 740.4 682.2
Funded status, ending (523.6) (473.8)  
Amounts Recognized in Consolidated Balance Sheet [Abstract]      
Accrued expenses 4.0 4.1  
Postretirement benefit liabilities 519.6 469.7  
Net amount recognized 523.6 473.8  
Prior Service Costs (Credits) [Abstract]      
Beginning balance 0.8 1.2  
Prior service cost (credit) arising during the period 0 0.1  
Amount recognized as component of net benefit costs (0.7) (0.5)  
Ending balance 0.1 0.8 1.2
Net Actuarial Losses [Abstract]      
Beginning balance 494.1 483.2  
Actuarial losses arising during the period 119.1 33.1  
Amount recognized as component of net benefit costs (21.3) (22.2)  
Ending balance 591.9 494.1  
Total 592.0 494.9  
Estimated pretax net actuarial loss in accumulated other comprehensive income (loss) 21.9    
Defined Benefit Plan, Weighted average assumptions used to determine pension and other postretirement benefit obligations [Abstract]      
Discount rate 4.50% 5.30%  
Rate of compensation increase 0.00% 0.00%  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate (in hundredths)   5.85% [14]  
Discount rate, lower range (in hundredths) 5.20% [14]   6.00% [14]
Discount rate, upper range (in hundredths) 5.30% [14]   7.65% [14]
Long-term rate of return on plan assets (in hundredths) 7.25% [15] 7.50% [15] 8.00% [15]
Rate of compensation increase (in hundredths) 0.00% [15] 0.00% [15] 0.00% [15]
Fair value of plan assets 795.7 740.4 682.2
Actual Return on Plan Assets [Abstract]      
Company contributions expected to be made in 2012 79.0 [16]    
Expected Benefit Payments [Abstract]      
2012 76.1    
2013 77.9    
2014 79.6    
2015 80.9    
2016 82.0    
2017-2021 418.0    
Company contributions expected to be made in 2012 to the qualified pension plans (required and discretionary) 75.0    
Company contributions expected to be made in 2012 to the unfunded benefit plans 4.0    
Other Postretirement Benefit Plans [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Reductions on benefit obligations due to negative plan amendments 6.1 0.8 11.9
Net Periodic Benefit Cost [Abstract]      
Service cost 0.2 0.4 1.1
Interest cost 3.2 3.9 4.9
Expected return on plan assets 0 0 0
Amortization of prior service costs (credits) (5.2) (3.9) (2.4)
Amortization of net actuarial loss 1.0 0 0
Curtailment loss 0 0 0.7
Settlement loss 0 0 0
Net pension and other benefit costs (0.8) 0.4 4.3
Change in Benefit Obligations [Roll Forward]      
Benefit obligation, beginning balance 77.8 76.0  
Service cost 0.2 0.4 1.1
Interest cost 3.2 3.9 4.9
Participant contributions (1.7) (1.9)  
Actuarial (gains) losses 2.8 6.6  
Benefit payments (9.7) (10.2)  
Plan amendments (6.1) (0.8)  
Benefit obligation, ending balance 69.9 77.8 76.0
Change in Plan Assets [Roll Forward]      
Fair value of plan assets, beginning 0 0  
Actual return on plan assets 0 0  
Employer contributions 8.0 8.3  
Participant contributions 1.7 1.9  
Benefit payments (9.7) (10.2)  
Fair value of plan assets, ending 0 0 0
Funded status, ending (69.9) (77.8)  
Amounts Recognized in Consolidated Balance Sheet [Abstract]      
Accrued expenses 9.2 10.4  
Postretirement benefit liabilities 60.7 67.4  
Net amount recognized 69.9 77.8  
Prior Service Costs (Credits) [Abstract]      
Beginning balance (23.4) (26.5)  
Prior service cost (credit) arising during the period (6.1) (0.8)  
Amount recognized as component of net benefit costs 5.2 3.9  
Ending balance (24.3) (23.4) (26.5)
Net Actuarial Losses [Abstract]      
Beginning balance 13.2 6.6  
Actuarial losses arising during the period 2.8 6.6  
Amount recognized as component of net benefit costs (1.0) 0  
Ending balance 15.0 13.2  
Total (9.3) (10.2)  
Estimated pretax prior service cost in accumulated other comprehensive income (loss) 6.2    
Estimated pretax net actuarial loss in accumulated other comprehensive income (loss) 2.2    
Defined Benefit Plan, Weighted average assumptions used to determine pension and other postretirement benefit obligations [Abstract]      
Discount rate 4.20% 4.80%  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate (in hundredths)   5.45% [14]  
Discount rate, lower range (in hundredths) 4.65% [14]   5.50% [14]
Discount rate, upper range (in hundredths) 4.80% [14]   7.25% [14]
Fair value of plan assets 0 0 0
Actual Return on Plan Assets [Abstract]      
Company contributions expected to be made in 2012 9.2 [16]    
Expected Benefit Payments [Abstract]      
2012 9.2    
2013 7.9    
2014 6.7    
2015 6.3    
2016 6.0    
2017-2021 $ 24.1    
[1] See Note 5 - Fair Value Measurements for a description of levels within the fair value hierarchy. The level in the fair value hierarchy within which the fair value measurement is classified is determined based on the lowest level input that is significant to the fair value measurement in its entirety. A description of the valuation methodologies is provided following these tables. There were no significant transfers in and/or out of Level 1, Level 2 and Level 3 in 2010.
[2] See Note 5 - Fair Value Measurements for a description of levels within the fair value hierarchy. The level in the fair value hierarchy within which the fair value measurement is classified is determined based on the lowest level input that is significant to the fair value measurement in its entirety. A description of the valuation methodologies is provided following these tables. There were no significant transfers in and/or out of Level 1, Level 2 and Level 3 in 2011.
[3] The majority of equity assets are invested in two indexed funds based on the Russell 3000 Index (U.S.) and the MSCI EAFE Equity Index (International). The Trust did not directly own any of the Company's common stock as of December 31, 2011.
[4] Effective June 2010, active equity managers were replaced with a passive equity manager. The majority of equity assets are invested in two indexed funds based on the Russell 3000 Index (U.S.) and the MSCI EAFE Equity Index (International). The Trust did not directly own any of the Company's common stock as of December 31, 2010.
[5] Government securities are comprised primarily of U.S. Treasury bonds and other government securities.
[6] Government securities are comprised primarily of U.S. Treasury bonds and to a lesser extent other government securities.
[7] Corporate securities consist primarily of investment grade bonds issued by companies in diversified industries.
[8] This class includes commingled funds that primarily invest in investment grade corporate securities and government-related securities. This class also includes investments in non-agency collateralized mortgage obligation and mortgage-backed securities, futures and options.
[9] This class includes commingled funds that primarily invest in government-related securities and investment grade corporate securities. This class also includes nominal investments in non-agency collateralized mortgage obligation and mortgage-backed securities, futures and options.
[10] This class represents a limited partnership real estate fund with investments in apartments. This fund was fully liquidated in 2011.
[11] This class includes a small amount of derivatives (interest rate swaps, options and futures).
[12] This class includes interest receivable and receivables/payables for securities sold/purchased.
[13] This class includes dividends and interest receivable and receivables or payables for securities sold or purchased.
[14] Range of discount rates in 2011 and 2009 reflects the remeasurements of pension and postretirement benefit costs during the year due to negative plan amendments and curtailments recognized.
[15] Assumption used in determining pension benefit cost only.
[16] The Company currently anticipates contributing approximately $75.0 million to fund the qualified pension plans and approximately $4.0 million to cover benefit payments in the unfunded, nonqualified pension plan in 2012. Company contributions are subject to change based on market conditions or Company discretion.