Equity - Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance beginning of period	$ 1,672.7
Balance end of period	1,832.9
Accumulated other comprehensive loss	(393.7)	$ (393.6)
Total Accumulated Other Comprehensive Income Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance beginning of period	(35.0)
Unrealized (losses) gains, arising during the period	0.3
Noncontrolling interests	1.1
Deferred taxes on unrealized losses (gains), arising during the period	(3.6)
Amounts reclassified out of AOCI during the period, gross	3.9
Amounts reclassified out of AOCI during the period, tax	(1.7)
Balance end of period	(35.0)
Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance beginning of period	(32.2)
Unrealized (losses) gains, arising during the period	(52.2)
Noncontrolling interests	1.1
Deferred taxes on unrealized losses (gains), arising during the period	0.8
Amounts reclassified out of AOCI during the period, gross	3.3
Amounts reclassified out of AOCI during the period, tax	(1.6)
Balance end of period	(80.8)
Foreign Currency Derivative Contracts | Currency Derivative Contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance beginning of period	2.6
Unrealized (losses) gains, arising during the period	49.8
Noncontrolling interests	0.0
Deferred taxes on unrealized losses (gains), arising during the period	(3.8)
Amounts reclassified out of AOCI during the period, gross	(0.2)
Amounts reclassified out of AOCI during the period, tax	0.1
Balance end of period	48.5
Foreign Currency Derivative Contracts | Interest Rate Swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance beginning of period	(5.4)
Unrealized (losses) gains, arising during the period	2.7
Noncontrolling interests	0.0
Deferred taxes on unrealized losses (gains), arising during the period	(0.6)
Amounts reclassified out of AOCI during the period, gross	0.8
Amounts reclassified out of AOCI during the period, tax	(0.2)
Balance end of period	(2.7)
Interest Rate Swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated other comprehensive loss	$ 358.4