Supplemental Equity and Comprehensive Income (Loss) Information - Changes in Equity (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Increase (decrease) in equity
Balance at the beginning of the period	$ 15,351	$ 15,004	$ 14,770	$ 15,117
Net income (loss)	(6,836)	82	(5,855)	1,385
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	25	(705)	141	(876)
Defined benefit pension and post-retirement plans adjustment	50	85	101	172
Cash flow hedging instruments	23	88	(1)	87
Total other comprehensive income (loss), net of tax	98	(532)	241	(617)
Dividends declared	(828)	(848)	(1,655)	(1,700)
Stock-based compensation	42	48	167	178
Reacquired stock			(29)	(773)
Issuances pursuant to stock option and benefit plans	30	62	218	226
Balance at the end of the period	7,857	13,816	7,857	13,816
Common Stock and Additional Paid-in Capital
Increase (decrease) in equity
Balance at the beginning of the period	6,825	6,568	6,700	6,438
Other comprehensive income (loss), net of tax:
Stock-based compensation	42	48	167	178
Balance at the end of the period	6,867	6,616	6,867	6,616
Retained Earnings
Increase (decrease) in equity
Balance at the beginning of the period	47,966	46,056	47,950	45,821
Net income (loss)	(6,841)	78	(5,865)	1,377
Other comprehensive income (loss), net of tax:
Dividends declared	(828)	(848)	(1,655)	(1,700)
Issuances pursuant to stock option and benefit plans	(7)	(17)	(140)	(229)
Balance at the end of the period	40,290	45,269	40,290	45,269
Treasury Stock
Increase (decrease) in equity
Balance at the beginning of the period	(32,963)	(30,860)	(33,255)	(30,463)
Other comprehensive income (loss), net of tax:
Reacquired stock			(29)	(773)
Issuances pursuant to stock option and benefit plans	37	79	358	455
Balance at the end of the period	(32,926)	(30,781)	(32,926)	(30,781)
Accumulated Other Comprehensive Income (Loss)
Increase (decrease) in equity
Balance at the beginning of the period	(6,530)	(6,834)	(6,673)	(6,750)
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	24	(701)	140	(871)
Defined benefit pension and post-retirement plans adjustment	50	85	101	172
Cash flow hedging instruments	23	88	(1)	87
Total other comprehensive income (loss), net of tax	97	(528)	240	(612)
Balance at the end of the period	(6,433)	(7,362)	(6,433)	(7,362)
Non-controlling Interest
Increase (decrease) in equity
Balance at the beginning of the period	53	74	48	71
Net income (loss)	5	4	10	8
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	1	(4)	1	(5)
Balance at the end of the period	$ 59	$ 74	$ 59	$ 74