Accumulated Other Comprehensive Income (Loss) - Balances (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Before-Tax Amount
Foreign currency translation adjustments, net	$ 135.3	$ (42.0)	$ 87.6	$ (46.0)
Unrecognized gains (losses) on cash flow hedges, net	5.5	4.3	14.3	4.9
Pension and other postretirement benefit prior service cost and gain or loss, net	(1.6)	2.3	2.3	3.8
Other comprehensive income (loss)	139.2	(35.4)	104.2	(37.3)
Tax Benefit or (Expense)
Foreign currency translation adjustments, net	7.3	(6.8)	7.7	(9.3)
Unrecognized gains (losses) on cash flow hedges, net	(1.3)	(1.0)	(3.4)	(0.2)
Pension and other postretirement benefit prior service cost and gain or loss, net	0.6	(0.4)	0.1	(0.5)
Other comprehensive income (loss)	6.6	(8.2)	4.4	(10.0)
Net of Tax Amount
Foreign currency translation adjustments, net	142.6	(48.8)	95.3	(55.3)
Unrecognized gains (losses) on cash flow hedges, net	4.2	3.3	10.9	4.7
Pension and other postretirement benefit prior service cost and gain or loss, net	(1.0)	1.9	2.4	3.3
Total other comprehensive income (loss), net of tax	145.8	(43.6)	108.6	(47.3)
Other comprehensive income, net of tax [Abstract]
Other comprehensive income (loss), net of tax, attributable to noncontrolling interest	$ 3.8	$ 0.0	$ (1.6)	$ 0.0