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, 2021		254,500,000
Beginning balance at Dec. 31, 2021	$ 10,100.0	$ 2.5	$ 6,880.8	$ 15.9	$ 3,200.8
Increase (Decrease) in Stockholders' Equity
Other comprehensive income (loss), net of tax	81.7			81.7
Net income	2,503.1				2,503.1
Common stock withheld for employee tax obligations (in shares)		(700,000)
Common stock withheld for employee tax obligations	(169.9)	$ (0.0)	(169.9)
Issuance of common stock under benefit plans (in shares)		2,800,000
Issuance of common stock under benefit plans	135.3	$ 0.1	135.2
Stock-based compensation expense	379.4		379.4
Ending balance (in shares) at Sep. 30, 2022		256,600,000
Ending balance at Sep. 30, 2022	13,029.6	$ 2.6	7,225.5	97.6	5,703.9
Beginning balance (in shares) at Jun. 30, 2022		256,000,000.0
Beginning balance at Jun. 30, 2022	11,933.5	$ 2.6	7,100.0	57.5	4,773.4
Increase (Decrease) in Stockholders' Equity
Other comprehensive income (loss), net of tax	40.1			40.1
Net income	930.5				930.5
Common stock withheld for employee tax obligations (in shares)		(200,000)
Common stock withheld for employee tax obligations	(48.0)	$ (0.0)	(48.0)
Issuance of common stock under benefit plans (in shares)		800,000
Issuance of common stock under benefit plans	38.2	$ 0.0	38.2
Stock-based compensation expense	135.3		135.3
Ending balance (in shares) at Sep. 30, 2022		256,600,000
Ending balance at Sep. 30, 2022	$ 13,029.6	$ 2.6	7,225.5	97.6	5,703.9
Beginning balance (in shares) at Dec. 31, 2022	257,011,628	257,000,000.0
Beginning balance at Dec. 31, 2022	$ 13,912.7	$ 2.6	7,386.5	0.8	6,522.8
Increase (Decrease) in Stockholders' Equity
Other comprehensive income (loss), net of tax	(3.8)			(3.8)
Net income	$ 2,650.8				2,650.8
Repurchase of common stock (in shares)	(891,060)	(900,000)
Repurchase of common stock	$ (284.1)	$ (0.0)	(284.1)
Common stock withheld for employee tax obligations (in shares)		(700,000)
Common stock withheld for employee tax obligations	(222.9)	$ (0.0)	(222.9)
Issuance of common stock under benefit plans (in shares)		2,400,000
Issuance of common stock under benefit plans	85.7	$ 0.0	85.7
Stock-based compensation expense	$ 374.4		374.4
Ending balance (in shares) at Sep. 30, 2023	257,828,508	257,800,000
Ending balance at Sep. 30, 2023	$ 16,512.8	$ 2.6	7,339.6	(3.0)	9,173.6
Beginning balance (in shares) at Jun. 30, 2023		257,800,000
Beginning balance at Jun. 30, 2023	15,470.2	$ 2.6	7,369.1	(39.8)	8,138.3
Increase (Decrease) in Stockholders' Equity
Other comprehensive income (loss), net of tax	36.8			36.8
Net income	1,035.3				1,035.3
Repurchase of common stock (in shares)		(400,000)
Repurchase of common stock	(123.0)	$ (0.0)	(123.0)
Common stock withheld for employee tax obligations (in shares)		(100,000)
Common stock withheld for employee tax obligations	(53.2)	$ (0.0)	(53.2)
Issuance of common stock under benefit plans (in shares)		500,000
Issuance of common stock under benefit plans	15.0	$ 0.0	15.0
Stock-based compensation expense	$ 131.7		131.7
Ending balance (in shares) at Sep. 30, 2023	257,828,508	257,800,000
Ending balance at Sep. 30, 2023	$ 16,512.8	$ 2.6	$ 7,339.6	$ (3.0)	$ 9,173.6