Pension Plans and Postretirement Benefits (Net Periodic Pension Benefit (Income) Expense) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 29, 2015	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Components of net period pension benefit expense
Curtailment	$ 1.2
Net periodic benefit (income) expense		$ (3.0)	$ 2.0	$ 1.7
Domestic
Components of net period pension benefit expense
Service cost - benefits earned during the period		10.4	12.4	11.7
Interest cost on benefit obligation		38.9	37.8	40.3
Expected return on plan assets		(72.9)	(74.4)	(73.7)
Amortization of prior service cost		(6.0)	(6.0)	(4.6)
Amortization of actuarial loss		26.6	33.4	24.6
Curtailment		0.0	(1.2)	0.0
Net periodic benefit (income) expense		(3.0)	2.0	(1.7)
Foreign
Components of net period pension benefit expense
Service cost - benefits earned during the period		0.8	0.9	0.8
Interest cost on benefit obligation		1.6	1.7	2.2
Expected return on plan assets		(2.2)	(2.2)	(2.6)
Amortization of prior service cost		0.0	0.0	0.0
Amortization of actuarial loss		0.6	0.6	0.0
Curtailment		0.0	0.0	0.0
Net periodic benefit (income) expense		$ 0.8	$ 1.0	$ 0.4