Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive (Loss) Income	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2020		259.9
Beginning balance at Dec. 31, 2020	$ 8,686.8	$ 2.6	$ 7,894.0	$ (68.5)	$ 858.7
Increase (Decrease) in Stockholders' Equity
Other comprehensive income, net of tax	80.0			80.0
Net income	1,572.0				1,572.0
Repurchase of common stock (in shares)		(5.3)
Repurchase of common stock	(1,067.2)	$ (0.0)	(1,067.2)
Common stock withheld for employee tax obligations (in shares)		(0.6)
Common stock withheld for employee tax obligations	(134.2)	$ (0.0)	(134.2)
Issuance of common stock under benefit plans (in shares)		2.2
Issuance of common stock under benefit plans	66.8	$ 0.0	66.8
Stock-based compensation expense	326.6		326.6
Ending balance (in shares) at Sep. 30, 2021		256.2
Ending balance at Sep. 30, 2021	9,530.8	$ 2.6	7,086.0	11.5	2,430.7
Beginning balance (in shares) at Jun. 30, 2021		259.1
Beginning balance at Jun. 30, 2021	9,196.4	$ 2.6	7,640.2	(25.2)	1,578.8
Increase (Decrease) in Stockholders' Equity
Other comprehensive income, net of tax	36.7			36.7
Net income	851.9				851.9
Repurchase of common stock (in shares)		(3.3)
Repurchase of common stock	(642.2)	$ (0.0)	(642.2)
Common stock withheld for employee tax obligations (in shares)		(0.1)
Common stock withheld for employee tax obligations	(28.6)	$ (0.0)	(28.6)
Issuance of common stock under benefit plans (in shares)		0.5
Issuance of common stock under benefit plans	12.9	$ 0.0	12.9
Stock-based compensation expense	103.7		103.7
Ending balance (in shares) at Sep. 30, 2021		256.2
Ending balance at Sep. 30, 2021	9,530.8	$ 2.6	7,086.0	11.5	2,430.7
Beginning balance (in shares) at Dec. 31, 2021		254.5
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, net of tax	81.7			81.7
Net income	2,503.1				2,503.1
Common stock withheld for employee tax obligations (in shares)		(0.7)
Common stock withheld for employee tax obligations	(169.9)	$ (0.0)	(169.9)
Issuance of common stock under benefit plans (in shares)		2.8
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		256.6
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		256.0
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, net of tax	40.1			40.1
Net income	930.5				930.5
Common stock withheld for employee tax obligations (in shares)		(0.2)
Common stock withheld for employee tax obligations	(48.0)	$ (0.0)	(48.0)
Issuance of common stock under benefit plans (in shares)		0.8
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		256.6
Ending balance at Sep. 30, 2022	$ 13,029.6	$ 2.6	$ 7,225.5	$ 97.6	$ 5,703.9