Pension and Other Postretirement Benefits (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.3	$ 0.3	$ 0.9	$ 0.8
Interest cost	15.6	16.3	46.8	48.7
Expected return on plan assets	(13.3)	(12.4)	(39.9)	(37.1)
Amortization of prior service costs (credits)	0.1	0.1	0.2	0.3
Amortization of net actuarial loss	5.2	5.5	16.0	16.6
Curtailment loss			0.3	0
Net pension and other benefit costs	7.9	9.8	24.3	29.3
Defined benefit plan, contributions by employer to unfunded, nonqualified pension plan			2.6	2.4
Defined benefit, contributions by employer to qualified pension plans			40.0	14.8
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0.1	0.2	0.3
Interest cost	0.8	0.9	2.5	2.9
Expected return on plan assets	0	0	0	0
Amortization of prior service costs (credits)	(1.5)	(0.9)	(3.7)	(2.9)
Amortization of net actuarial loss	0.3	0	0.7	0
Curtailment loss			0	0
Net pension and other benefit costs	$ (0.4)	$ 0.1	$ (0.3)	$ 0.3