Supplemental Equity and Comprehensive Income Information - SE Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Increase (decrease) in equity
Balance at the beginning of the period	$ 15,004	$ 13,828	$ 15,117	$ 12,931
Net income	82	1,525	1,385	3,152
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	(705)	170	(876)	(52)
Defined benefit pension and postretirement plans adjustment	85	121	172	240
Cash flow hedging instruments	88	(11)	87	47
Total other comprehensive income (loss), net of tax	(532)	280	(617)	235
Dividends declared	(848)	(858)	(1,700)	(1,716)
Stock-based compensation	48	54	178	175
Reacquired stock	0	(499)	(773)	(742)
Issuances pursuant to stock option and benefit plans	62	186	226	481
Balance at the end of the period	13,816	14,516	13,816	14,516
Common Stock and Additional Paid-in Capital
Increase (decrease) in equity
Balance at the beginning of the period	6,568	6,292	6,438	6,171
Other comprehensive income (loss), net of tax:
Stock-based compensation	48	54	178	175
Balance at the end of the period	6,616	6,346	6,616	6,346
Retained Earnings
Increase (decrease) in equity
Balance at the beginning of the period	46,056	44,255	45,821	43,821
Net income	78	1,524	1,377	3,148
Other comprehensive income (loss), net of tax:
Dividends declared	(848)	(858)	(1,700)	(1,716)
Issuances pursuant to stock option and benefit plans	(17)	(97)	(229)	(429)
Balance at the end of the period	45,269	44,824	45,269	44,824
Treasury Stock
Increase (decrease) in equity
Balance at the beginning of the period	(30,860)	(29,020)	(30,463)	(29,404)
Other comprehensive income (loss), net of tax:
Reacquired stock	0	(499)	(773)	(742)
Issuances pursuant to stock option and benefit plans	79	283	455	910
Balance at the end of the period	(30,781)	(29,236)	(30,781)	(29,236)
Accumulated Other Comprehensive Income (Loss)
Increase (decrease) in equity
Balance at the beginning of the period	(6,834)	(7,767)	(6,750)	(7,721)
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	(701)	171	(871)	(52)
Defined benefit pension and postretirement plans adjustment	85	121	172	240
Cash flow hedging instruments	88	(11)	87	47
Total other comprehensive income (loss), net of tax	(528)	281	(612)	235
Balance at the end of the period	(7,362)	(7,486)	(7,362)	(7,486)
Non- controlling Interest
Increase (decrease) in equity
Balance at the beginning of the period	74	68	71	64
Net income	4	1	8	4
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	(4)	(1)	(5)	0
Balance at the end of the period	$ 74	$ 68	$ 74	$ 68