Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2023		257,700,000
Beginning balance at Dec. 31, 2023	$ 17,580.4	$ 2.6	$ 7,449.7	$ (14.3)	$ 10,142.4
Increase (Decrease) in Stockholders' Equity
Other comprehensive income (loss), net of tax	43.1			43.1
Net (loss) income	(1,448.6)				(1,448.6)
Repurchase of common stock (in shares)		(1,700,000)
Repurchases of common stock	(763.8)		(763.8)
Common stock withheld for employee tax obligations (in shares)		(900,000)
Common stock withheld for employee tax obligations	(397.7)		(397.7)
Issuance of common stock under benefit plans (in shares)		2,600,000
Issuance of common stock under benefit plans	79.3		79.3
Stock-based compensation expense	538.2		538.2
Ending balance (in shares) at Sep. 30, 2024		257,700,000
Ending balance at Sep. 30, 2024	15,630.9	$ 2.6	6,905.7	28.8	8,693.8
Beginning balance (in shares) at Jun. 30, 2024		258,000,000.0
Beginning balance at Jun. 30, 2024	14,774.7	$ 2.6	7,101.2	22.5	7,648.4
Increase (Decrease) in Stockholders' Equity
Other comprehensive income (loss), net of tax	6.3			6.3
Net (loss) income	1,045.4				1,045.4
Repurchase of common stock (in shares)		(600,000)
Repurchases of common stock	(307.6)		(307.6)
Common stock withheld for employee tax obligations (in shares)		(200,000)
Common stock withheld for employee tax obligations	(83.7)		(83.7)
Issuance of common stock under benefit plans (in shares)		500,000
Issuance of common stock under benefit plans	7.6		7.6
Stock-based compensation expense	188.2		188.2
Ending balance (in shares) at Sep. 30, 2024		257,700,000
Ending balance at Sep. 30, 2024	$ 15,630.9	$ 2.6	6,905.7	28.8	8,693.8
Beginning balance (in shares) at Dec. 31, 2024	256,940,382	256,900,000
Beginning balance at Dec. 31, 2024	$ 16,409.6	$ 2.6	6,672.4	127.8	9,606.8
Increase (Decrease) in Stockholders' Equity
Other comprehensive income (loss), net of tax	(192.3)			(192.3)
Net (loss) income	2,762.1				2,762.1
Repurchase of common stock (in shares)		(4,500,000)
Repurchases of common stock	(1,906.7)	$ (0.1)	(1,906.6)
Common stock withheld for employee tax obligations (in shares)		(800,000)
Common stock withheld for employee tax obligations	(367.4)		(367.4)
Issuance of common stock under benefit plans (in shares)		2,400,000
Issuance of common stock under benefit plans	74.0		74.0
Stock-based compensation expense	$ 539.5		539.5
Ending balance (in shares) at Sep. 30, 2025	253,951,475	254,000,000.0
Ending balance at Sep. 30, 2025	$ 17,318.8	$ 2.5	5,011.9	(64.5)	12,368.9
Beginning balance (in shares) at Jun. 30, 2025		256,300,000
Beginning balance at Jun. 30, 2025	17,175.4	$ 2.6	5,987.9	(101.1)	11,286.0
Increase (Decrease) in Stockholders' Equity
Other comprehensive income (loss), net of tax	36.6			36.6
Net (loss) income	1,082.9				1,082.9
Repurchase of common stock (in shares)		(2,700,000)
Repurchases of common stock	(1,092.5)	$ (0.1)	(1,092.4)
Common stock withheld for employee tax obligations (in shares)		(200,000)
Common stock withheld for employee tax obligations	(91.0)		(91.0)
Issuance of common stock under benefit plans (in shares)		600,000
Issuance of common stock under benefit plans	8.1		8.1
Stock-based compensation expense	$ 199.3		199.3
Ending balance (in shares) at Sep. 30, 2025	253,951,475	254,000,000.0
Ending balance at Sep. 30, 2025	$ 17,318.8	$ 2.5	$ 5,011.9	$ (64.5)	$ 12,368.9