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, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in plan assets:
Fair value of plan assets at beginning of period	$ 668.7
Fair value of plan assets at end of period	762.0	$ 668.7
Pension Plan
Change in benefit obligations:
Benefit obligation at beginning of period	815.6	906.9
Service cost	3.9	4.3	$ 7.0
Interest cost	21.9	21.7	22.9
Actuarial (gain) loss	77.0	(32.1)
Settlement	(3.7)	(22.7)
Benefits paid	(38.5)	(34.1)
Employee contributions	0.7	0.7
Business acquisition	9.0	0.0
Other	(0.2)	6.0
Foreign exchange impact	12.1	(35.1)
Benefit obligation at end of period	897.8	815.6	906.9
Change in plan assets:
Fair value of plan assets at beginning of period	668.7	776.2
Actual return on plan assets	89.0	(34.0)
Employer contributions	20.9	15.7
Employee contributions	0.7	0.7
Benefits paid	(38.5)	(34.1)
Settlement	(3.7)	(22.7)
Business acquisition	10.7	0.0
Other	(0.5)	0.7
Foreign exchange impact	14.7	(33.8)
Fair value of plan assets at end of period	762.0	668.7	776.2
Underfunded status at end of year	(135.8)	(146.9)
Accumulated benefit obligation at end of year	884.5	803.0
U.S. | Pension Plan
Change in benefit obligations:
Benefit obligation at beginning of period	182.1	204.7
Service cost	0.1	0.1	0.1
Interest cost	6.9	6.5	6.8
Actuarial (gain) loss	17.0	(10.6)
Settlement	0.0	(7.6)
Benefits paid	(12.1)	(11.2)
Employee contributions	0.0	0.0
Business acquisition	0.0	0.0
Other	0.1	0.2
Foreign exchange impact	0.0	0.0
Benefit obligation at end of period	194.1	182.1	204.7
Change in plan assets:
Fair value of plan assets at beginning of period	119.9	148.7
Actual return on plan assets	21.3	(10.5)
Employer contributions	8.1	0.4
Employee contributions	0.0	0.0
Benefits paid	(12.1)	(11.2)
Settlement	0.0	(7.6)
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	137.1	119.9	148.7
Underfunded status at end of year	(57.0)	(62.2)
Accumulated benefit obligation at end of year	194.1	182.1
International | Pension Plan
Change in benefit obligations:
Benefit obligation at beginning of period	633.5	702.2
Service cost	3.8	4.2	6.9
Interest cost	15.0	15.2	16.1
Actuarial (gain) loss	60.0	(21.5)
Settlement	(3.7)	(15.1)
Benefits paid	(26.4)	(22.9)
Employee contributions	0.7	0.7
Business acquisition	9.0	0.0
Other	(0.3)	5.8
Foreign exchange impact	12.1	(35.1)
Benefit obligation at end of period	703.7	633.5	702.2
Change in plan assets:
Fair value of plan assets at beginning of period	548.8	627.5
Actual return on plan assets	67.7	(23.5)
Employer contributions	12.8	15.3
Employee contributions	0.7	0.7
Benefits paid	(26.4)	(22.9)
Settlement	(3.7)	(15.1)
Business acquisition	10.7	0.0
Other	(0.4)	0.6
Foreign exchange impact	14.7	(33.8)
Fair value of plan assets at end of period	624.9	548.8	$ 627.5
Underfunded status at end of year	(78.8)	(84.7)
Accumulated benefit obligation at end of year	$ 690.4	$ 620.9