Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 16,409.6	$ 17,580.4	$ 13,912.7
Other comprehensive income (loss) before reclassifications	(193.3)	168.0	8.6
Amounts reclassified from accumulated other comprehensive income (loss)	49.6	(25.9)	(23.7)
Total other comprehensive (loss) income	(143.7)	142.1	(15.1)
Ending balance	18,665.8	16,409.6	17,580.4
Foreign Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	9.7	1.1	(25.0)
Other comprehensive income (loss) before reclassifications	27.5	8.6	26.1
Amounts reclassified from accumulated other comprehensive income (loss)	0.0
Total other comprehensive (loss) income	27.5	8.6	26.1
Ending balance	37.2	9.7	1.1
On Available-For-Sale Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	7.1	9.6	(0.1)
Other comprehensive income (loss) before reclassifications	34.5	(4.4)	9.7
Amounts reclassified from accumulated other comprehensive income (loss)	(7.6)	1.9
Total other comprehensive (loss) income	26.9	(2.5)	9.7
Ending balance	34.0	7.1	9.6
On Foreign Currency Forward Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	111.0	(25.0)	25.9
Other comprehensive income (loss) before reclassifications	(255.3)	163.8	(27.2)
Amounts reclassified from accumulated other comprehensive income (loss)	57.2	(27.8)	(23.7)
Total other comprehensive (loss) income	(198.1)	136.0	(50.9)
Ending balance	(87.1)	111.0	(25.0)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	127.8	(14.3)	0.8
Total other comprehensive (loss) income	(143.7)	142.1	(15.1)
Ending balance	$ (15.9)	$ 127.8	$ (14.3)