Pension Plans and Postretirement Benefits (Changes in Plan Assets) (Details) - Pension Benefits - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018
United States
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of net plan assets - beginning of year	$ 780.3	$ 896.0
Actual return on plan assets	113.1	(37.0)
Employer contribution - other benefit plan	2.3	2.0
Foreign currency changes	0.0	0.0
Benefits paid	(60.0)	(80.7)
Other	0.0	0.0
Fair value of net plan assets - end of year	835.7	780.3
Foreign Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of net plan assets - beginning of year	43.4	46.7
Actual return on plan assets	5.4	0.8
Employer contribution - other benefit plan	0.7	2.2
Foreign currency changes	0.6	(2.5)
Benefits paid	(2.0)	(1.9)
Other	(0.1)	(1.9)
Fair value of net plan assets - end of year	$ 48.0	$ 43.4