CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Adjustment upon adoption of new accounting standard	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Adjustment upon adoption of new accounting standard	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Class A Stock Common Stock
Beginning Balance (in shares) at Dec. 31, 2018			111.1					(4.0)	1.9
Beginning Balance at Dec. 31, 2018	$ 8,757.3	$ 9.7	$ 0.1	$ 3,911.6	$ 5,254.3	$ 9.7	$ (12.3)	$ (396.4)	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock for equity awards granted under long-term incentive plans (in shares)			2.6
Issuance of Common Stock for equity awards granted under long-term incentive plans	213.2			213.2
Common Stock tendered upon exercise of stock options and vesting of restricted stock for employee tax obligations (in shares)			(0.5)
Common Stock tendered upon exercise of stock options and vesting of restricted stock for employee tax obligations	(188.0)			(188.0)
Issuance/distribution of Common Stock for 401(k) Savings Plan (in shares)								0.1
Issuance/distribution of Common Stock for 401(k) Savings Plan	38.1			24.9				$ 13.2
Repurchases of Common Stock (in shares)								(1.0)
Repurchases of Common Stock	(356.7)							$ (356.7)
Conversion of Class A Stock to Common Stock (in shares)			0.1						(0.1)
Stock-based compensation charges	466.9			466.9
Net income	2,115.8				2,115.8
Other comprehensive income, net of tax	33.4						33.4
Ending Balance (in shares) at Dec. 31, 2019			113.3					(4.9)	1.8
Ending Balance at Dec. 31, 2019	11,089.7		$ 0.1	4,428.6	7,379.8		21.1	$ (739.9)	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock for equity awards granted under long-term incentive plans (in shares)			9.6
Issuance of Common Stock for equity awards granted under long-term incentive plans	2,576.4			2,576.4
Common Stock tendered upon exercise of stock options and vesting of restricted stock for employee tax obligations (in shares)			(1.4)
Common Stock tendered upon exercise of stock options and vesting of restricted stock for employee tax obligations	(768.9)			(768.9)
Issuance/distribution of Common Stock for 401(k) Savings Plan (in shares)								0.1
Issuance/distribution of Common Stock for 401(k) Savings Plan	44.7			37.2				$ 7.5
Repurchases of Common Stock (in shares)								(11.6)
Repurchases of Common Stock	(5,880.9)							$ (5,880.9)
Stock-based compensation charges	442.9			442.9
Net income	3,513.2				3,513.2
Other comprehensive income, net of tax	8.2						8.2
Ending Balance (in shares) at Dec. 31, 2020			121.5					(16.4)	1.8
Ending 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)			6.2
Issuance of Common Stock for equity awards granted under long-term incentive plans	1,676.0			1,676.0
Common Stock tendered upon exercise of stock options and vesting of restricted stock for employee tax obligations (in shares)			(1.5)
Common Stock tendered upon exercise of stock options and vesting of restricted stock for employee tax obligations	(944.6)			(944.6)
Issuance/distribution of Common Stock for 401(k) Savings Plan (in shares)								0.1
Issuance/distribution of Common Stock for 401(k) Savings Plan	48.1			40.7				$ 7.4
Repurchases of Common Stock (in shares)								(3.1)
Repurchases of Common Stock	(1,655.0)							$ (1,655.0)
Stock-based compensation charges	599.2			599.2
Net income	8,075.3				8,075.3
Other comprehensive income, net of tax	(55.5)						(55.5)
Ending Balance (in shares) at Dec. 31, 2021			126.2					(19.4)	1.8
Ending Balance at Dec. 31, 2021	$ 18,768.8		$ 0.1	$ 8,087.5	$ 18,968.3		$ (26.2)	$ (8,260.9)	$ 0.0