Pension Plans and Postretirement Benefits (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Pension Benefits [Member]
Components of net period pension benefit expense
Service cost — benefits earned during the period	$ 3.1	$ 3.8
Interest cost on benefit obligation	10.7	9.6
Expected return on plan assets	(19.1)	(18.1)
Amortization of prior service cost	(1.2)	(1.2)
Amortization of net actuarial loss (gain)	6.2	10.2
Net (income)/expense	(0.3)	4.3
Postretirement Plans [Member]
Components of net period pension benefit expense
Interest cost on benefit obligation	0.2	0.2
Amortization of prior service cost	(0.1)	(0.2)
Amortization of net actuarial loss (gain)	(0.1)	(0.1)
Net (income)/expense	$ 0	$ (0.1)