Pension Plans and Postretirement Benefits (Changes in Benefit Obligation) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, settlements	$ 14.6	$ 10.5
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Annuity premium	27.2
Domestic
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation - beginning of year	820.4	878.4
Interest cost on projected benefit obligation	38.9	37.8	$ 40.3
Actuarial gain	29.5	(33.8)
Benefits paid	(88.3)	(57.2)
Benefit obligation - end of year	810.9	820.4	878.4
Plan amendments	0.0	(17.0)
Postretirement Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation - beginning of year	10.7	12.8
Interest cost on projected benefit obligation	0.5	0.5	0.6
Actuarial gain	0.1	(1.3)
Benefits paid	(1.5)	(1.3)
Benefit obligation - end of year	$ 9.8	$ 10.7	$ 12.8