Pension Plans and Postretirement Benefits (Net Periodic Pension Benefit Expense) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 29, 2015	Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013
Components of net period pension benefit expense
Curtailment	$ 1.2
Net periodic benefit (income) expense		$ 2.0	$ 1.7	$ 16.6
Postretirement Plans
Components of net period pension benefit expense
Service cost - benefits earned during the period		0.0	0.0	0.0
Interest cost on benefit obligation		0.5	0.6	0.6
Amortization of prior service cost		0.0	(0.2)	(0.5)
Amortization of actuarial gain		(0.2)	(0.5)	(0.3)
Net periodic benefit (income) expense		0.3	(0.1)	(0.2)
Pension Benefits Domestic Plans
Components of net period pension benefit expense
Service cost - benefits earned during the period		12.4	11.7	14.4
Interest cost on benefit obligation		37.8	40.3	36.3
Expected return on plan assets		(74.4)	(73.7)	(70.1)
Amortization of prior service cost		(6.0)	(4.6)	(4.6)
Amortization of actuarial loss		33.4	24.6	40.6
Curtailment		(1.2)	0.0	0.0
Net periodic benefit (income) expense		2.0	(1.7)	16.6
Pension Benefits Foreign Plans
Components of net period pension benefit expense
Service cost - benefits earned during the period		0.9	0.8	0.9
Interest cost on benefit obligation		1.7	2.2	1.9
Expected return on plan assets		(2.2)	(2.6)	(2.0)
Amortization of prior service cost		0.0	0.0	0.0
Amortization of actuarial loss		0.6	0.0	0.1
Curtailment		0.0	0.0	0.0
Net periodic benefit (income) expense		$ 1.0	$ 0.4	$ 0.9