CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Class A Stock Common Stock
Beginning Balance (in shares) at Dec. 31, 2020		121.5				(16.4)	1.8
Beginning Balance at Dec. 31, 2020	$ 11,025.3	$ 0.1	$ 6,716.2	$ 10,893.0	$ 29.3	$ (6,613.3)	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock for equity awards granted under long-term incentive plans (in shares)		0.5
Issuance of Common Stock for equity awards granted under long-term incentive plans	93.9		93.9
Common Stock tendered upon exercise of stock options and vesting of restricted stock for employee tax obligations (in shares)		(0.1)
Common Stock tendered upon exercise of stock options and vesting of restricted stock for employee tax obligations	(66.4)		(66.4)
Issuance/distribution of Common Stock for 401(k) Savings Plan	10.0		8.5			$ 1.5
Repurchases of Common Stock (in shares)						(0.7)
Repurchases of Common Stock	(323.5)					$ (323.5)
Stock-based compensation charges	135.6		135.6
Net income	1,115.2			1,115.2
Other comprehensive income (loss), net of tax	(13.1)				(13.1)
Ending Balance (in shares) at Mar. 31, 2021		121.9				(17.1)	1.8
Ending Balance at Mar. 31, 2021	11,977.0	$ 0.1	6,887.8	12,008.2	16.2	$ (6,935.3)	$ 0.0
Beginning Balance (in shares) at Dec. 31, 2021		126.2				(19.4)	1.8
Beginning Balance at Dec. 31, 2021	18,768.8	$ 0.1	8,087.5	18,968.3	(26.2)	$ (8,260.9)	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock for equity awards granted under long-term incentive plans (in shares)		1.6
Issuance of Common Stock for equity awards granted under long-term incentive plans	593.7		593.7
Common Stock tendered upon exercise of stock options and vesting of restricted stock for employee tax obligations (in shares)		(0.2)
Common Stock tendered upon exercise of stock options and vesting of restricted stock for employee tax obligations	(105.8)		(105.8)
Issuance/distribution of Common Stock for 401(k) Savings Plan	14.5		12.8			$ 1.7
Repurchases of Common Stock (in shares)						(0.5)
Repurchases of Common Stock	(352.0)					$ (352.0)
Stock-based compensation charges	165.9		165.9
Net income	973.5			973.5
Other comprehensive income (loss), net of tax	(143.9)				(143.9)
Ending Balance (in shares) at Mar. 31, 2022		127.6				(19.9)	1.8
Ending Balance at Mar. 31, 2022	$ 19,914.7	$ 0.1	$ 8,754.1	$ 19,941.8	$ (170.1)	$ (8,611.2)	$ 0.0