Annual report pursuant to Section 13 and 15(d)

Postretirement Benefits (Details)

v2.4.0.8
Postretirement Benefits (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]      
Defined contribution plan expense $ 35.6 $ 34.2 $ 30.9
Contributions to multiemployer plans 0.4 0.6 0.5
Reductions of benefit obligations due to negative plan amendments   0.2  
Change in Benefit Obligations [Roll Forward]      
Plan amendments   (0.2)  
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at previous December 31 898.6 [1]    
Fair value of plan assets at December 31 956.0 [2] 898.6 [1]  
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]      
Projected benefit obligation 1,249.3 1,388.0  
Accumulated benefit obligation 1,249.3 1,388.0  
Fair value of plan assets 956.0 898.6  
Funded status 77.00% 65.00%  
Unfunded, nonqualified pension plan projected and accumulated benefit obligations included in funded status of the Company's pension plans 37.9 42.3  
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, Assumed Health Care Cost Trend Rates [Abstract]      
Health care cost trend rate for next year 7.30% 7.50%  
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) 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    
Effect on accumulated postretirement benefit obligation, increase 0.3    
Effect on total service and interest cost, decrease 0    
Effect on accumulated postretirement benefit obligation, decrease (0.3)    
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]      
Total 100.00% 100.00%  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total 100.00%    
Total pension plan assets 956.0 [2] 898.6 [1]  
Expected Benefit Payments [Abstract]      
Amortization of prior service costs (credits) for former/inactive employees 1.3 1.3  
Next fiscal year amortization of prior service costs (credits) for former/inactive employees 1.3    
Fair Value, Inputs, Level 1 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 27.8 [2] 102.8 [1]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 27.8 [2] 102.8 [1]  
Fair Value, Inputs, Level 2 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 944.0 [2] 794.7 [1]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 944.0 [2] 794.7 [1]  
Fair Value, Inputs, Level 3 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2] 0 [1]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 0 [2] 0 [1]  
Fair Value [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 971.8 [2] 897.5 [1]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 971.8 [2] 897.5 [1]  
Short-term Investments [Member]
      
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]      
Total 24.00% 7.00%  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total 0.00%    
Short-term Investments [Member] | Fair Value, Inputs, Level 1 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2] 0.1 [1]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 0 [2] 0.1 [1]  
Short-term Investments [Member] | Fair Value, Inputs, Level 2 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 237.0 [2] 61.9 [1]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 237.0 [2] 61.9 [1]  
Short-term Investments [Member] | Fair Value, Inputs, Level 3 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2] 0 [1]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 0 [2] 0 [1]  
Short-term Investments [Member] | Fair Value [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 237.0 [2] 62.0 [1]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 237.0 [2] 62.0 [1]  
United States Equity Securities [Member]
      
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]      
Total 25.00% 37.00%  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total 15.00%    
United States Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2],[3] 0 [1],[4]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 0 [2],[3] 0 [1],[4]  
United States Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 243.8 [2],[3] 336.7 [1],[4]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 243.8 [2],[3] 336.7 [1],[4]  
United States Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2],[3] 0 [1],[4]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 0 [2],[3] 0 [1],[4]  
United States Equity Securities [Member] | Fair Value [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 243.8 [2],[3] 336.7 [1],[4]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 243.8 [2],[3] 336.7 [1],[4]  
International Equity Securities [Member]
      
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]      
Total 5.00% 7.00%  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total 5.00%    
International Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2],[3] 0 [1],[4]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension 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 at December 31 46.8 [2],[3] 60.6 [1],[4]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 46.8 [2],[3] 60.6 [1],[4]  
International Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2],[3] 0 [1],[4]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension 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 at December 31 46.8 [2],[3] 60.6 [1],[4]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 46.8 [2],[3] 60.6 [1],[4]  
Fixed Income Securities [Member]
      
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]      
Total 46.00% 49.00%  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total 80.00%    
Government Fixed-Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 27.8 [2],[5] 102.7 [1],[5]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 27.8 [2],[5] 102.7 [1],[5]  
Government Fixed-Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 42.4 [2],[5] 43.8 [1],[5]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 42.4 [2],[5] 43.8 [1],[5]  
Government Fixed-Income Securities [Member] | Fair Value, Inputs, Level 3 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2],[5] 0 [1],[5]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 0 [2],[5] 0 [1],[5]  
Government Fixed-Income Securities [Member] | Fair Value [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 70.2 [2],[5] 146.5 [1],[5]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 70.2 [2],[5] 146.5 [1],[5]  
Corporate Fixed-Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2],[6] 0 [1],[6]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 0 [2],[6] 0 [1],[6]  
Corporate Fixed-Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 157.0 [2],[6] 117.5 [1],[6]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 157.0 [2],[6] 117.5 [1],[6]  
Corporate Fixed-Income Securities [Member] | Fair Value, Inputs, Level 3 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2],[6] 0 [1],[6]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 0 [2],[6] 0 [1],[6]  
Corporate Fixed-Income Securities [Member] | Fair Value [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 157.0 [2],[6] 117.5 [1],[6]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 157.0 [2],[6] 117.5 [1],[6]  
Commingled Funds [Member] | Fair Value, Inputs, Level 1 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2],[7] 0 [1],[7]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 0 [2],[7] 0 [1],[7]  
Commingled Funds [Member] | Fair Value, Inputs, Level 2 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 208.0 [2],[7] 174.2 [1],[7]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 208.0 [2],[7] 174.2 [1],[7]  
Commingled Funds [Member] | Fair Value, Inputs, Level 3 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2],[7] 0 [1],[7]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 0 [2],[7] 0 [1],[7]  
Commingled Funds [Member] | Fair Value [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 208.0 [2],[7] 174.2 [1],[7]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 208.0 [2],[7] 174.2 [1],[7]  
Other Investments [Member] | Fair Value, Inputs, Level 1 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2],[8]    
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 0 [2],[8]    
Other Investments [Member] | Fair Value, Inputs, Level 2 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 9.0 [2],[8]    
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 9.0 [2],[8]    
Other Investments [Member] | Fair Value, Inputs, Level 3 [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 0 [2],[8]    
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 0 [2],[8]    
Other Investments [Member] | Fair Value [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 9.0 [2],[8]    
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 9.0 [2],[8]    
Other Pension Plan Assets [Member] | Fair Value [Member]
      
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at December 31 (15.8) [2],[9] 1.1 [1],[9]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets (15.8) [2],[9] 1.1 [1],[9]  
Pension Plans [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Reductions of benefit obligations due to negative plan amendments 0 0  
Net Periodic Benefit Cost [Abstract]      
Service cost 0.1 0.2 1.1
Interest cost 54.0 57.7 62.4
Expected return on plan assets (57.0) (55.2) (53.3)
Amortization of prior service costs (credits) 0 0 0.4
Amortization of net actuarial losses 21.4 21.9 21.3
Curtailment loss 0 0.1 0.3
Net pension and other benefit costs 18.5 24.7 32.2
Change in Benefit Obligations [Roll Forward]      
Benefit obligation at previous December 31 1,388.0 1,319.3  
Service cost 0.1 0.2 1.1
Interest cost 54.0 57.7 62.4
Participant contributions 0 0  
Actuarial (gains) losses (116.4) 84.5  
Benefit payments (76.4) (73.7)  
Plan amendments 0 0  
Benefit obligation at December 31 1,249.3 1,388.0 1,319.3
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at previous December 31 898.6 795.7  
Actual return on plan assets 80.0 107.6  
Employer contributions 53.8 69.0  
Participant contributions 0 0  
Benefit payments (76.4) (73.7)  
Fair value of plan assets at December 31 956.0 898.6 795.7
Funded status at December 31 (293.3) (489.4)  
Amounts Recognized in Consolidated Balance Sheet [Abstract]      
Accrued expenses 3.8 4.0  
Postretirement benefit liabilities 289.5 485.4  
Net amount recognized 293.3 489.4  
Prior Service Costs (Credits) [Abstract]      
Beginning balance 0 0.1  
Prior service credits arising during the period 0 0  
Amount recognized as component of net benefit costs 0 (0.1)  
Ending balance 0 0 0.1
Net Actuarial Losses [Abstract]      
Beginning balance 602.1 591.9  
Actuarial (gains) losses arising during the period (139.4) 32.1  
Amount recognized as component of net benefit costs (21.4) (21.9)  
Ending balance 441.3 602.1 591.9
Total 441.3 602.1  
Estimated pretax prior service (cost) credit in accumulated other comprehensive income (loss) expected to be recognized over the next year 0    
Estimated pretax net actuarial loss in accumulated other comprehensive income (loss) expected to be recognized over the next year 15.0    
Defined Benefit Plan, Weighted average assumptions used to determine pension and other postretirement benefit obligations [Abstract]      
Discount rate 4.85% 4.00%  
Rate of compensation increase 0.00% [10] 0.00% [10]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate 4.00% [11] 4.50% [11]  
Long-term rate of return on plan assets 6.50% [12] 7.00% [12] 7.25% [12]
Rate of compensation increase 0.00% [12] 0.00% [12] 0.00% [12]
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 956.0 898.6 795.7
Expected Benefit Payments [Abstract]      
Company contributions expected to be made in 2014 55.8 [13]    
2014 80.6    
2015 82.1    
2016 83.1    
2017 83.8    
2018 84.1    
2019-2023 419.1    
Defined Benefit Plan Estimated Future Employer Required Contributions In Next Fiscal Year Qualified Plan 52.0    
Defined Benefit Plan Estimated Future Employer Contributions In Next Fiscal Year Unfunded Plan 3.8    
Pension Plans [Member] | Minimum [Member]
      
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate     5.20% [11]
Pension Plans [Member] | Maximum [Member]
      
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate     5.30% [11]
Other Postretirement Benefit Plans [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Reductions of benefit obligations due to negative plan amendments 0 0.2  
Net Periodic Benefit Cost [Abstract]      
Service cost 0 0 0.2
Interest cost 1.9 2.4 3.2
Expected return on plan assets 0 0 0
Amortization of prior service costs (credits) (5.7) (6.3) (5.2)
Amortization of net actuarial losses 1.3 0.7 1.0
Curtailment loss 0 0 0
Net pension and other benefit costs (2.5) (3.2) (0.8)
Change in Benefit Obligations [Roll Forward]      
Benefit obligation at previous December 31 58.0 69.9  
Service cost 0 0 0.2
Interest cost 1.9 2.4 3.2
Participant contributions 1.1 1.3  
Actuarial (gains) losses (5.2) (5.5)  
Benefit payments (8.1) (9.9)  
Plan amendments 0 (0.2)  
Benefit obligation at December 31 47.7 58.0 69.9
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at previous December 31 0 0  
Actual return on plan assets 0 0  
Employer contributions 7.0 8.6  
Participant contributions 1.1 1.3  
Benefit payments (8.1) (9.9)  
Fair value of plan assets at December 31 0 0 0
Funded status at December 31 (47.7) (58.0)  
Amounts Recognized in Consolidated Balance Sheet [Abstract]      
Accrued expenses 5.8 7.1  
Postretirement benefit liabilities 41.9 50.9  
Net amount recognized 47.7 58.0  
Prior Service Costs (Credits) [Abstract]      
Beginning balance (18.2) (24.3)  
Prior service credits arising during the period 0 (0.2)  
Amount recognized as component of net benefit costs 5.7 6.3  
Ending balance (12.5) (18.2) (24.3)
Net Actuarial Losses [Abstract]      
Beginning balance 8.8 15.0  
Actuarial (gains) losses arising during the period (5.2) (5.5)  
Amount recognized as component of net benefit costs (1.3) (0.7)  
Ending balance 2.3 8.8 15.0
Total (10.2) (9.4)  
Estimated pretax prior service (cost) credit in accumulated other comprehensive income (loss) expected to be recognized over the next year 0.8    
Estimated pretax net actuarial loss in accumulated other comprehensive income (loss) expected to be recognized over the next year 0    
Defined Benefit Plan, Weighted average assumptions used to determine pension and other postretirement benefit obligations [Abstract]      
Discount rate 4.40% 3.60%  
Rate of compensation increase 0.00% [10] 0.00% [10]  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate 3.60% [11] 4.20% [11]  
Defined Benefit Plan, Assets, Target Allocations [Abstract]      
Total pension plan assets 0 0 0
Expected Benefit Payments [Abstract]      
Company contributions expected to be made in 2014 5.8 [13]    
2014 5.8    
2015 5.3    
2016 4.8    
2017 4.4    
2018 4.1    
2019-2023 $ 15.4    
Other Postretirement Benefit Plans [Member] | Minimum [Member]
      
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate     4.65% [11]
Other Postretirement Benefit Plans [Member] | Maximum [Member]
      
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate     4.80% [11]
[1] See Note 6 – 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 transfers in and/or out of Level 1, Level 2 and Level 3 in 2012.
[2] See Note 6 – 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 transfers in and/or out of Level 1, Level 2 and Level 3 in 2013.
[3] The 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, 2013.
[4] The 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, 2012.
[5] Government securities are comprised primarily of U.S. Treasury bonds and other government securities.
[6] Corporate securities consist primarily of investment grade bonds issued by companies in diversified industries.
[7] 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.
[8] Other investments consist primarily of interest rate swaps.
[9] This class includes interest receivable and receivables/payables for securities sold/purchased.
[10] Assumption used in determining pension benefit obligation only. The rate of compensation increase was reduced to 0.00% at December 31, 2008, as a result of the decision to freeze future benefit accruals for those plans where benefits are based on average compensation.
[11] Range of discount rates in 2011 reflects the remeasurements of pension and postretirement benefit costs during the year due to negative plan amendments and curtailments recognized.
[12] Assumption used in determining pension benefit cost only.
[13] The Company currently anticipates contributing approximately $52.0 million to fund the qualified pension plans and approximately $3.8 million to cover benefit payments in the unfunded, nonqualified pension plan in 2014. Company contributions are subject to change based on market conditions or Company discretion.