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 loss, net of tax	41.6			41.6
Net income	1,572.6				1,572.6
Common stock withheld for employee tax obligations (in shares)		(500,000)
Common stock withheld for employee tax obligations	(121.9)	$ (0.0)	(121.9)
Issuance of common stock under benefit plans (in shares)		2,000,000.0
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		256,000,000.0
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		255,600,000
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 loss, 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)		400,000
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		256,000,000.0
Ending balance at Jun. 30, 2022	$ 11,933.5	$ 2.6	7,100.0	57.5	4,773.4
Beginning balance (in shares) at 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 loss, net of tax	(40.6)			(40.6)
Net income	$ 1,615.5				1,615.5
Repurchase of common stock (in shares)	(538,505)	(500,000)
Repurchase of common stock	$ (161.1)	$ (0.0)	(161.1)
Common stock withheld for employee tax obligations (in shares)		(600,000)
Common stock withheld for employee tax obligations	(169.7)	$ (0.0)	(169.7)
Issuance of common stock under benefit plans (in shares)		1,900,000
Issuance of common stock under benefit plans	70.7	$ 0.0	70.7
Stock-based compensation expense	$ 242.7		242.7
Ending balance (in shares) at Jun. 30, 2023	257,792,648	257,800,000
Ending balance at Jun. 30, 2023	$ 15,470.2	$ 2.6	7,369.1	(39.8)	8,138.3
Beginning balance (in shares) at Mar. 31, 2023		257,500,000
Beginning balance at Mar. 31, 2023	14,432.3	$ 2.6	7,220.2	(13.1)	7,222.6
Increase (Decrease) in Stockholders' Equity
Other comprehensive loss, net of tax	(26.7)			(26.7)
Net income	915.7				915.7
Repurchase of common stock (in shares)		(0.0)
Repurchase of common stock	(25.5)	$ (0.0)	(25.5)
Common stock withheld for employee tax obligations (in shares)		(0.0)
Common stock withheld for employee tax obligations	(3.1)	$ (0.0)	(3.1)
Issuance of common stock under benefit plans (in shares)		300,000
Issuance of common stock under benefit plans	57.6	$ 0.0	57.6
Stock-based compensation expense	$ 119.9		119.9
Ending balance (in shares) at Jun. 30, 2023	257,792,648	257,800,000
Ending balance at Jun. 30, 2023	$ 15,470.2	$ 2.6	$ 7,369.1	$ (39.8)	$ 8,138.3