Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Activity in Plan Asset Measured Using Level 3 Inputs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	$ 668.7
Fair value of plan assets at end of period	762.0	$ 668.7
Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	150.1
Fair value of plan assets at end of period	180.2	150.1
Pension Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	668.7	776.2
Foreign exchange gain (loss)	14.7	(33.8)
Fair value of plan assets at end of period	762.0	668.7
Pension Plan | Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	150.1	71.5
Gains (losses) on assets still held at end of year	16.8	(16.0)
Purchases, sales, issuance, and settlements	8.3	103.7
Transfers in and/or out of Level 3	0.0	1.0
Foreign exchange gain (loss)	5.0	(10.1)
Fair value of plan assets at end of period	$ 180.2	$ 150.1