Pension Plans and Postretirement Benefits (Changes in Plan Assets) (Details) - Pension Benefits - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017
Domestic
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning of period	$ 896.0	$ 857.1
Actual return on plan assets	(37.0)	123.1
Employer contribution - other benefit plan	2.0	2.1
Foreign currency changes	0.0	0.0
Benefits paid	(80.7)	(86.3)
Other	0.0	0.0
Fair value of plan assets, end of period	780.3	896.0
Foreign Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning of period	46.7	42.1
Actual return on plan assets	0.8	2.5
Employer contribution - other benefit plan	2.2	2.6
Foreign currency changes	(2.5)	4.3
Benefits paid	(1.9)	(2.4)
Other	(1.9)	(2.4)
Fair value of plan assets, end of period	$ 43.4	$ 46.7