Consolidated Statements of Changes in Equity and Redeemable Non-Controlling Interest - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income/(Loss)	Non- Controlling Interest in Consolidated Subsidiaries
Common stock, shares beginning (in shares) at Jun. 30, 2021		631.0
Treasury stock, shares beginning (in shares) at Dec. 31, 2020			(68.0)
Beginning balance at Dec. 31, 2020	$ 19,534	$ 6	$ (5,200)	$ 13,845	$ 11,039	$ (192)	$ 36
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive (loss) income	18					18
Exercise of common stock options	8			8
Payments relating to treasury shares	(67)		$ (67)
Stock-based compensation	81			81
Issuance under the employee stock purchase plan	18			18
Issuance of restricted stock (in shares)		2.0
Distributions of profits	(11)						(11)
Dividends paid to stockholders	(374)				(374)
Net income/(loss) attributable to non-controlling interest	(6)				5		(11)
Net income	1,903				1,903
Common stock, shares ending (in shares) at Dec. 31, 2020		629.0
Treasury stock, shares ending (in shares) at Jun. 30, 2021			(68.0)
Ending balance at Jun. 30, 2021	21,116	$ 6	$ (5,267)	13,952	12,563	(174)	36
Redeemable non-controlling interest, beginning balance at Dec. 31, 2020	93
Increase (Decrease) in Temporary Equity [Roll Forward]
Stock-based compensation	2
Net income/(loss) attributable to non-controlling interest	(6)
Redeemable non-controlling interest, ending balance at Jun. 30, 2021	89
Common stock, shares beginning (in shares) at Jun. 30, 2021		631.0
Treasury stock, shares beginning (in shares) at Mar. 31, 2021			(68.0)
Beginning balance at Mar. 31, 2021	19,994	$ 6	$ (5,265)	13,908	11,498	(184)	31
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive (loss) income	10					10
Exercise of common stock options	5			5
Payments relating to treasury shares	(2)		$ (2)
Stock-based compensation	39			39
Dividends paid to stockholders	(187)				(187)
Net income/(loss) attributable to non-controlling interest	(4)				1		(5)
Net income	1,253				1,253
Common stock, shares ending (in shares) at Mar. 31, 2021		631.0
Treasury stock, shares ending (in shares) at Jun. 30, 2021			(68.0)
Ending balance at Jun. 30, 2021	21,116	$ 6	$ (5,267)	13,952	12,563	(174)	36
Redeemable non-controlling interest, beginning balance at Mar. 31, 2021	91
Increase (Decrease) in Temporary Equity [Roll Forward]
Stock-based compensation	2
Net income/(loss) attributable to non-controlling interest	(4)
Redeemable non-controlling interest, ending balance at Jun. 30, 2021	$ 89
Common stock, shares beginning (in shares) at Jun. 30, 2022	558.0	633.0
Treasury stock, shares beginning (in shares) at Dec. 31, 2021			(70.0)
Beginning balance at Dec. 31, 2021	$ 22,748	$ 6	$ (5,520)	14,069	14,350	(196)	39
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive (loss) income	(109)					(109)
Exercise of common stock options	$ 20			20
Repurchases of common stock (in shares)	(5.0)		(4.0)
Repurchases of common stock	$ (632)		$ (632)
Payments relating to treasury shares (in shares)			(1.0)
Payments relating to treasury shares	(71)		$ (71)
Stock-based compensation	88			88
Issuance under the employee stock purchase plan	24			24
Issuance of restricted stock (in shares)		2.0
Distributions of profits	(13)						(13)
Dividends paid to stockholders	(427)				(427)
Net income/(loss) attributable to non-controlling interest					(21)		21
Net income	$ 1,233				1,233
Common stock, shares ending (in shares) at Dec. 31, 2021	561.0	631.0
Treasury stock, shares ending (in shares) at Jun. 30, 2022			(75.0)
Ending balance at Jun. 30, 2022	$ 22,861	$ 6	$ (6,223)	14,201	15,135	(305)	47
Common stock, shares beginning (in shares) at Jun. 30, 2022	558.0	633.0
Treasury stock, shares beginning (in shares) at Mar. 31, 2022			(74.0)
Beginning balance at Mar. 31, 2022	$ 22,703	$ 6	$ (6,064)	14,153	14,793	(221)	36
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive (loss) income	(84)					(84)
Exercise of common stock options	$ 5			5
Repurchases of common stock (in shares)	(1.3)		(1.0)
Repurchases of common stock	$ (157)		$ (157)
Payments relating to treasury shares	(2)		$ (2)
Stock-based compensation	43			43
Dividends paid to stockholders	(213)				(213)
Net income/(loss) attributable to non-controlling interest					(11)		11
Net income	566				566
Common stock, shares ending (in shares) at Mar. 31, 2022		633.0
Treasury stock, shares ending (in shares) at Jun. 30, 2022			(75.0)
Ending balance at Jun. 30, 2022	$ 22,861	$ 6	$ (6,223)	$ 14,201	$ 15,135	$ (305)	$ 47