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	31.6			31.6
Net income	$ 1,099.6				1,099.6
Repurchase of common stock (in shares)	(300,000)	(300,000)
Repurchases of common stock	$ (140.4)	$ (0.0)	(140.4)
Common stock withheld for employee tax obligations (in shares)		(600,000)
Common stock withheld for employee tax obligations	(233.5)	$ (0.0)	(233.5)
Issuance of common stock under benefit plans (in shares)		1,500,000
Issuance of common stock under benefit plans	15.9	$ 0.0	15.9
Stock-based compensation expense	193.0		193.0
Ending balance (in shares) at Mar. 31, 2024		258,300,000
Ending balance at Mar. 31, 2024	$ 18,546.6	$ 2.6	7,284.7	17.3	11,242.0
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	(59.7)			(59.7)
Net income	$ 646.3				646.3
Repurchase of common stock (in shares)	(900,000)	(900,000)
Repurchases of common stock	$ (416.9)	$ (0.0)	(416.9)
Common stock withheld for employee tax obligations (in shares)		(600,000)
Common stock withheld for employee tax obligations	(270.5)	$ (0.0)	(270.5)
Issuance of common stock under benefit plans (in shares)		1,600,000
Issuance of common stock under benefit plans	18.5	$ 0.0	18.5
Stock-based compensation expense	$ 169.0		169.0
Ending balance (in shares) at Mar. 31, 2025	256,967,767	257,000,000.0
Ending balance at Mar. 31, 2025	$ 16,496.3	$ 2.6	$ 6,172.5	$ 68.1	$ 10,253.1