Consolidated Statements of Changes in Total Equity - USD ($) $ in Millions	Total	Adjustment upon Adoption	Shareholders' Equity	Shareholders' Equity Adjustment upon Adoption	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive (Loss)	Retained Earnings	Retained Earnings Adjustment upon Adoption	Treasury Stock	Other Non- controlling Interests
Balance at Dec. 31, 2019	$ 45,344	$ (30)	$ 45,338	$ (30)	$ 4	$ 28,306	$ (941)	$ 20,162	$ (30)	$ (2,193)	$ 6
Changes in Total Equity [Roll Forward]
Effect of issuing stock for employee benefit plans	582		582			672				(90)
Other comprehensive income (loss)	80		80				80
Net income	8,475		8,458					8,458			17
Common dividends declared	(15)		(15)					(15)
Repurchase of common stock	(4,089)		(4,089)							(4,089)
Other transactions impacting noncontrolling interests	(19)		(3)			(3)					(16)
Balance at Dec. 31, 2020	50,328		50,321		4	28,975	(861)	28,575		(6,372)	7
Balance at Dec. 31, 2019	35
Change in Redeemable Noncontrolling Interests
Other comprehensive loss	(8)
Net income	14
Other transactions impacting noncontrolling interests	17
Balance at Dec. 31, 2020	$ 58
Change in Redeemable Noncontrolling Interests
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-13 [Member]
Effect of issuing stock for employee benefit plans	$ 511		511			604				(93)
Other comprehensive income (loss)	(23)		(23)				(23)
Net income	5,396		5,365					5,365			31
Common dividends declared	(1,347)		(1,347)					(1,347)
Repurchase of common stock	(7,710)		(7,710)							(7,710)
Other transactions impacting noncontrolling interests	(25)		(5)			(5)					(20)
Balance at Dec. 31, 2021	47,130		47,112		4	29,574	(884)	32,593		(14,175)	18
Change in Redeemable Noncontrolling Interests
Other comprehensive loss	(14)
Net income	19
Other transactions impacting noncontrolling interests	(9)
Balance at Dec. 31, 2021	54
Changes in Total Equity [Roll Forward]
Effect of issuing stock for employee benefit plans	583		583			659				(76)
Other comprehensive income (loss)	(511)		(511)				(511)
Net income	6,735		6,668					6,668			67
Common dividends declared	(1,387)		(1,387)					(1,387)
Repurchase of common stock	(7,593)		(7,593)							(7,593)
Other transactions impacting noncontrolling interests	(72)		0								(72)
Balance at Dec. 31, 2022	44,885		$ 44,872		$ 4	$ 30,233	$ (1,395)	$ 37,874		$ (21,844)	$ 13
Change in Redeemable Noncontrolling Interests
Other comprehensive loss	(2)
Net income	11
Other transactions impacting noncontrolling interests	3
Balance at Dec. 31, 2022	$ 66