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
Ending balance (in shares) at Mar. 31, 2021		258.8
Ending balance at Mar. 31, 2021	8,980.3	$ 2.6	7,499.2	(33.3)	1,511.8
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	43.3			43.3
Net income	720.1				720.1
Repurchase of common stock (in shares)		(2.0)
Repurchase of common stock	(424.9)	$ (0.0)	(424.9)
Common stock withheld for employee tax obligations (in shares)		(0.5)
Common stock withheld for employee tax obligations	(105.7)	$ (0.0)	(105.7)
Issuance of common stock under benefit plans (in shares)		1.7
Issuance of common stock under benefit plans	53.8	$ 0.0	53.8
Stock-based compensation expense	223.0		223.0
Ending balance (in shares) at Jun. 30, 2021		259.1
Ending balance at Jun. 30, 2021	9,196.4	$ 2.6	7,640.2	(25.2)	1,578.8
Beginning balance (in shares) at Mar. 31, 2021		258.8
Beginning balance at Mar. 31, 2021	8,980.3	$ 2.6	7,499.2	(33.3)	1,511.8
Increase (Decrease) in Stockholders' Equity
Other comprehensive income, net of tax	8.1			8.1
Net income	67.0				67.0
Repurchase of common stock	0.0
Common stock withheld for employee tax obligations (in shares)		(0.0)
Common stock withheld for employee tax obligations	(3.5)	$ (0.0)	(3.5)
Issuance of common stock under benefit plans (in shares)		0.3
Issuance of common stock under benefit plans	38.6	$ 0.0	38.6
Stock-based compensation expense	105.9		105.9
Ending balance (in shares) at Jun. 30, 2021		259.1
Ending balance at Jun. 30, 2021	9,196.4	$ 2.6	7,640.2	(25.2)	1,578.8
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	41.6			41.6
Net income	1,572.6				1,572.6
Common stock withheld for employee tax obligations (in shares)		(0.5)
Common stock withheld for employee tax obligations	(121.9)	$ (0.0)	(121.9)
Issuance of common stock under benefit plans (in shares)		2.0
Issuance of common stock under benefit plans	97.1	$ 0.1	97.0
Stock-based compensation expense	244.1		244.1
Ending balance (in shares) at Jun. 30, 2022		256.0
Ending balance at Jun. 30, 2022	11,933.5	$ 2.6	7,100.0	57.5	4,773.4
Beginning balance (in shares) at Mar. 31, 2022		255.6
Beginning balance at Mar. 31, 2022	10,907.0	$ 2.6	6,930.2	11.3	3,962.9
Increase (Decrease) in Stockholders' Equity
Other comprehensive income, net of tax	46.2			46.2
Net income	810.5				810.5
Common stock withheld for employee tax obligations (in shares)		(0.0)
Common stock withheld for employee tax obligations	(4.4)	$ (0.0)	(4.4)
Issuance of common stock under benefit plans (in shares)		0.4
Issuance of common stock under benefit plans	60.6	$ 0.0	60.6
Stock-based compensation expense	113.6		113.6
Ending balance (in shares) at Jun. 30, 2022		256.0
Ending balance at Jun. 30, 2022	$ 11,933.5	$ 2.6	$ 7,100.0	$ 57.5	$ 4,773.4