Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 13,912.7	$ 10,100.0
Other comprehensive income (loss) before reclassifications	3.3	11.2
Amounts reclassified from accumulated other comprehensive income (loss)	(17.2)	(15.8)
Total other comprehensive loss	(13.9)	(4.6)
Ending balance	14,432.3	10,907.0
Foreign Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(25.0)	(13.6)
Other comprehensive income (loss) before reclassifications	10.0	(12.4)
Amounts reclassified from accumulated other comprehensive income (loss)	0.0	0.0
Total other comprehensive loss	10.0	(12.4)
Ending balance	(15.0)	(26.0)
On Available-For-Sale Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(0.1)	(0.5)
Other comprehensive income (loss) before reclassifications	2.9	(2.3)
Amounts reclassified from accumulated other comprehensive income (loss)	0.0	0.0
Total other comprehensive loss	2.9	(2.3)
Ending balance	2.8	(2.8)
On Foreign Currency Forward Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	25.9	30.0
Other comprehensive income (loss) before reclassifications	(9.6)	25.9
Amounts reclassified from accumulated other comprehensive income (loss)	(17.2)	(15.8)
Total other comprehensive loss	(26.8)	10.1
Ending balance	(0.9)	40.1
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	0.8	15.9
Total other comprehensive loss	(13.9)	(4.6)
Ending balance	$ (13.1)	$ 11.3