Quarterly report pursuant to Section 13 or 15(d)

Pension and Other Postretirement Benefits (Details)

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Pension and Other Postretirement Benefits (Details) (USD $)
In Millions
 3 Months Ended 6 Months Ended
Jul. 02, 2011
Jul. 03, 2010
Jul. 02, 2011
Jul. 03, 2010
Pension Plans, Defined Benefit [Member]
        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 0.3 $ 0.2 $ 0.6 $ 0.5
Interest cost 15.6 16.2 31.2 32.4
Expected return on plan assets (13.3) (12.4) (26.6) (24.7)
Amortization of prior service costs (credits) 0 0.1 0.1 0.2
Amortization of net actuarial loss 5.4 5.6 10.8 11.1
Curtailment loss 0.3 0 0.3 0
Net pension and other benefit costs 8.3 9.7 16.4 19.5
Defined benefit plan, contributions by employer to unfunded, nonqualified pension plan     1.4 1.5
Defined benefit plan, contributions by employer to qualified pension plan     20.0 7.4
Other Postretirement Benefit Plans, Defined Benefit [Member]
        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 0.1 0.1 0.2 0.2
Interest cost 0.8 1.0 1.7 2.0
Expected return on plan assets 0 0 0 0
Amortization of prior service costs (credits) (1.2) (1.0) (2.2) (2.0)
Amortization of net actuarial loss 0.2 0 0.4 0
Curtailment loss 0 0 0 0
Net pension and other benefit costs $ (0.1) $ 0.1 $ 0.1 $ 0.2