Pension Plans and Postretirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2016	Mar. 29, 2015
Components of net period pension benefit expense
Pension plan curtailment		$ 1.2
Pension Plan
Components of net period pension benefit expense
Service cost — benefits earned during the period	$ 2.8	3.3
Interest cost on benefit obligation	10.1	9.9
Expected return on plan assets	(18.7)	(19.2)
Amortization of prior service cost	(1.5)	(1.5)
Amortization of net actuarial losses (gains)	6.8	8.5
Pension plan curtailment	0.0	(1.2)
Net periodic expense (income)	(0.5)	(0.2)
Other Postretirement Benefit Plan
Components of net period pension benefit expense
Interest cost on benefit obligation	0.1	0.1
Amortization of net actuarial losses (gains)	(0.1)	0.0
Net periodic expense (income)	$ 0.0	$ 0.1