Condensed Consolidated Statement of Shareholders' Investment - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period	$ 31,301
Net earnings	564	$ 672
Other comprehensive income (loss)	(921)	116
Balance at end of period	30,427
Common Shares:
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period	23,853	23,512
Issued under incentive stock programs	53	76
Share-based compensation	245	237
Issuance of restricted stock awards	(420)	(364)
Balance at end of period	23,731	23,461
Common Shares Held in Treasury:
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period	(10,147)	(9,962)
Issuance of restricted stock awards	253	303
Purchased	(19)	(20)
Balance at end of period	(9,913)	(9,679)
Earnings Employed in the Business:
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period	25,847	24,560
Impact of adoption of new accounting standards	(5)
Net earnings	564	672
Cash dividends declared on common shares	(641)	(568)
Effect of common and treasury share transactions	21	(51)
Balance at end of period	25,786	24,613
Accumulated Other Comprehensive Income (Loss):
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period	(8,465)	(7,586)
Other comprehensive income (loss)	(921)	116
Balance at end of period	(9,386)	(7,470)
Noncontrolling Interests in Subsidiaries:
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period	213	198
Noncontrolling Interests' share of income, business combinations, net of distributions and share repurchases	(4)	6
Balance at end of period	$ 209	$ 204