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	(4.6)			(4.6)
Net income	762.1				762.1
Common stock withheld for employee tax obligations (in shares)		(500,000)
Common stock withheld for employee tax obligations	(117.5)	$ (0.0)	(117.5)
Issuance of common stock under benefit plans (in shares)		1,600,000
Issuance of common stock under benefit plans	36.5	$ 0.1	36.4
Stock-based compensation expense	130.5		130.5
Ending balance (in shares) at Mar. 31, 2022		255,600,000
Ending balance at Mar. 31, 2022	$ 10,907.0	$ 2.6	6,930.2	11.3	3,962.9
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 loss, net of tax	(13.9)			(13.9)
Net income	$ 699.8				699.8
Repurchase of common stock (in shares)	(459,017)	(500,000)
Repurchase of common stock	$ (135.6)	$ (0.0)	(135.6)
Common stock withheld for employee tax obligations (in shares)		(600,000)
Common stock withheld for employee tax obligations	(166.6)	$ (0.0)	(166.6)
Issuance of common stock under benefit plans (in shares)		1,600,000
Issuance of common stock under benefit plans	13.1	$ 0.0	13.1
Stock-based compensation expense	$ 122.8		122.8
Ending balance (in shares) at Mar. 31, 2023	257,509,761	257,500,000
Ending balance at Mar. 31, 2023	$ 14,432.3	$ 2.6	$ 7,220.2	$ (13.1)	$ 7,222.6