Condensed Consolidated Statement of Shareholders' Investment - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period			$ 31,301
Net earnings	$ 1,232	$ 960	2,333	$ 2,638
Other comprehensive income (loss)	36	(398)	(579)	(177)
Balance at end of period	31,595		31,595
Common Shares:
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period	23,893	23,665	23,853	23,512
Issued under incentive stock programs	48	18	167	205
Share-based compensation	101	93	451	436
Issuance of restricted stock awards	(5)	(5)	(434)	(382)
Balance at end of period	24,037	23,771	24,037	23,771
Common Shares Held in Treasury:
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period	(9,904)	(9,659)	(10,147)	(9,962)
Issuance of restricted stock awards	32	28	295	352
Purchased	(1)		(21)	(21)
Balance at end of period	(9,873)	(9,631)	(9,873)	(9,631)
Earnings Employed in the Business:
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period	25,669	25,045	25,847	24,560
Net earnings	1,232	960	2,333	2,638
Cash dividends declared on common shares	(641)	(570)	(1,922)	(1,706)
Effect of common and treasury share transactions	6	5	13	(52)
Balance at end of period	26,266	25,440	26,266	25,440
Earnings Employed in the Business: | Impact of adoption of new accounting standard
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period			(5)
Accumulated Other Comprehensive Income (Loss):
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period	(9,080)	(7,365)	(8,465)	(7,586)
Other comprehensive income (loss)	36	(398)	(579)	(177)
Balance at end of period	(9,044)	(7,763)	(9,044)	(7,763)
Noncontrolling Interests in Subsidiaries:
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period	220	208	213	198
Noncontrolling Interests' share of income, business combinations, net of distributions and share repurchases	(11)	(6)	(4)	4
Balance at end of period	$ 209	$ 202	$ 209	$ 202