Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Change in Benefit Obligation and Plan Assets, Funded Status for Pension Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in plan assets:
Fair value of plan assets at beginning of period	$ 762.0
Fair value of plan assets at end of period	836.6	$ 762.0
Pension Plan
Change in benefit obligations:
Benefit obligation at beginning of period	897.8	815.6
Service cost	4.6	3.9	$ 4.3
Interest cost	16.5	21.9	21.7
Actuarial loss	82.7	77.0
Settlement	(9.8)	(3.7)
Benefits paid	(38.9)	(38.5)
Employee contributions	0.8	0.7
Business acquisition	0.0	9.0
Other	0.3	(0.2)
Foreign exchange impact	31.1	12.1
Benefit obligation at end of period	985.1	897.8	815.6
Change in plan assets:
Fair value of plan assets at beginning of period	762.0	668.7
Actual return on plan assets	71.1	89.0
Employer contributions	24.9	20.9
Employee contributions	0.8	0.7
Benefits paid	(38.9)	(38.5)
Settlement	(9.9)	(3.7)
Business acquisition	0.0	10.7
Other	(0.3)	(0.5)
Foreign exchange impact	26.9	14.7
Fair value of plan assets at end of period	836.6	762.0	668.7
Underfunded status at end of year	(148.5)	(135.8)
Accumulated benefit obligation at end of year	968.3	884.5
U.S. | Pension Plan
Change in benefit obligations:
Benefit obligation at beginning of period	194.1	182.1
Service cost	0.1	0.1	0.1
Interest cost	5.3	6.9	6.5
Actuarial loss	18.2	17.0
Settlement	0.0	0.0
Benefits paid	(15.5)	(12.1)
Employee contributions	0.0	0.0
Business acquisition	0.0	0.0
Other	0.0	0.1
Foreign exchange impact	0.0	0.0
Benefit obligation at end of period	202.2	194.1	182.1
Change in plan assets:
Fair value of plan assets at beginning of period	137.1	119.9
Actual return on plan assets	8.6	21.3
Employer contributions	11.3	8.1
Employee contributions	0.0	0.0
Benefits paid	(15.5)	(12.1)
Settlement	0.0	0.0
Business acquisition	0.0	0.0
Other	0.1	(0.1)
Foreign exchange impact	0.0	0.0
Fair value of plan assets at end of period	141.6	137.1	119.9
Underfunded status at end of year	(60.6)	(57.0)
Accumulated benefit obligation at end of year	202.2	194.1
International | Pension Plan
Change in benefit obligations:
Benefit obligation at beginning of period	703.7	633.5
Service cost	4.5	3.8	4.2
Interest cost	11.2	15.0	15.2
Actuarial loss	64.5	60.0
Settlement	(9.8)	(3.7)
Benefits paid	(23.4)	(26.4)
Employee contributions	0.8	0.7
Business acquisition	0.0	9.0
Other	0.3	(0.3)
Foreign exchange impact	31.1	12.1
Benefit obligation at end of period	782.9	703.7	633.5
Change in plan assets:
Fair value of plan assets at beginning of period	624.9	548.8
Actual return on plan assets	62.5	67.7
Employer contributions	13.6	12.8
Employee contributions	0.8	0.7
Benefits paid	(23.4)	(26.4)
Settlement	(9.9)	(3.7)
Business acquisition	0.0	10.7
Other	(0.4)	(0.4)
Foreign exchange impact	26.9	14.7
Fair value of plan assets at end of period	695.0	624.9	$ 548.8
Underfunded status at end of year	(87.9)	(78.8)
Accumulated benefit obligation at end of year	$ 766.1	$ 690.4