Consolidated Statement of Shareholders' Equity - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	[1]	Common Stock	Common Stock Surplus	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	[1]	Treasury Stock	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjustment	[1]
Beginning Balance at Dec. 31, 2018	$ 12,110			$ 482	$ 2,946	$ 29,326			$ (17,244)	$ (3,400)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	3,484					3,484
Cash dividends declared	(1,177)					(1,177)
Equity-based awards	163				93				70
Shares purchased	(184)								(184)
Other comprehensive income (loss)	(418)									(418)
Ending Balance at Dec. 31, 2019	13,978	$ (37)		482	3,039	31,633	$ (37)		(17,358)	(3,818)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	3,167					3,167
Cash dividends declared	(1,265)					(1,265)
Equity-based awards	152				85				67
Shares purchased	(602)								(602)
Other comprehensive income (loss)	268									268
Ending Balance at Dec. 31, 2020	15,661			482	3,124	33,498			(17,893)	(3,550)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	3,257					3,257
Cash dividends declared	(1,335)					(1,335)
Equity-based awards	263				154				109
Shares purchased	(1,835)								(1,835)
Other comprehensive income (loss)	1,630									1,630
Ending Balance at Dec. 31, 2021	$ 17,641			$ 482	$ 3,278	$ 35,420			$ (19,619)	$ (1,920)

[1] Reflects the cumulative effect of ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which we adopted on January 1, 2020.