Equity - Accumulated Other Comprehensive Income (loss), Net of Tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	$ 4,475.1	$ 4,316.9	$ 4,543.5
Other comprehensive loss before reclassifications	15.8	(20.9)	(31.3)
Amount reclassified from accumulated other comprehensive income (loss)	29.1	27.2	(26.4)
Other comprehensive income (loss), net	44.9	6.3	(57.7)
Ending balance	4,492.7	4,475.1	4,316.9
Other comprehensive income (loss)	(29.8)	(25.8)	28.9
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	4.2	(2.1)	55.6
Other comprehensive income (loss), net	44.9	6.3	(57.7)
Ending balance	49.1	4.2	(2.1)
Unrealized Gains/Losses on Available-for- Sale Debt Securities
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	21.8	27.9	34.1
Other comprehensive loss before reclassifications	7.1	(6.5)	(5.0)
Amount reclassified from accumulated other comprehensive income (loss)	0.0	0.4	(1.2)
Other comprehensive income (loss), net	7.1	(6.1)	(6.2)
Ending balance	28.9	21.8	27.9
Unrealized Gains/Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	61.5	19.0	57.7
Other comprehensive loss before reclassifications	11.7	15.7	(13.5)
Amount reclassified from accumulated other comprehensive income (loss)	29.1	26.8	(25.2)
Other comprehensive income (loss), net	40.8	42.5	(38.7)
Ending balance	102.3	61.5	19.0
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Beginning balance	(79.1)	(49.0)	(36.2)
Other comprehensive loss before reclassifications	(3.0)	(30.1)	(12.8)
Amount reclassified from accumulated other comprehensive income (loss)	0.0	0.0	0.0
Other comprehensive income (loss), net	(3.0)	(30.1)	(12.8)
Ending balance	$ (82.1)	$ (79.1)	$ (49.0)