Equity - Accumulated Other Comprehensive Income (loss), Net of Tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Balance	$ 4,316.9	$ 4,543.5	$ 4,610.6
Other comprehensive income before reclassifications	(20.9)	(31.3)	67.8
Amount reclassified from accumulated other comprehensive income (loss)	27.2	(26.4)	6.3
Other comprehensive income (loss), net	6.3	(57.7)	74.1
Balance	4,475.1	4,316.9	4,543.5
Other comprehensive income (loss)	25.8	28.9	(8.9)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Balance	(2.1)	55.6	(18.5)
Other comprehensive income (loss), net	6.3	(57.7)	74.1
Balance	4.2	(2.1)	55.6
Unrealized Gains/Losses on Available-for- Sale Debt Securities
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Balance	27.9	34.1	29.7
Other comprehensive income before reclassifications	(6.5)	(5.0)	5.7
Amount reclassified from accumulated other comprehensive income (loss)	0.4	(1.2)	(1.3)
Other comprehensive income (loss), net	(6.1)	(6.2)	4.4
Balance	21.8	27.9	34.1
Unrealized Gains/Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Balance	19.0	57.7	(4.3)
Other comprehensive income before reclassifications	15.7	(13.5)	54.4
Amount reclassified from accumulated other comprehensive income (loss)	26.8	(25.2)	7.6
Other comprehensive income (loss), net	42.5	(38.7)	62.0
Balance	61.5	19.0	57.7
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Balance	(49.0)	(36.2)	(43.9)
Other comprehensive income before reclassifications	(30.1)	(12.8)	7.7
Amount reclassified from accumulated other comprehensive income (loss)	0.0	0.0	0.0
Other comprehensive income (loss), net	(30.1)	(12.8)	7.7
Balance	$ (79.1)	$ (49.0)	$ (36.2)