Equity Activity - AOCI Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the Beginning of the Period	$ 19,476	$ 22,067	$ 18,996	$ 20,727
Other comprehensive income/(loss)	5,030	350	6,096	2,035
Balance at the End of the Period	20,147	22,357	20,147	22,357
Pre-tax pension settlement charge	5,900		5,894
Pension settlement charge, net of tax	4,400
Accumulated Other Comprehensive Income/(Loss)
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the Beginning of the Period	(22,169)	(27,652)	(23,234)	(29,337)
Other comprehensive income before reclassifications			697	382
Amount reclassified from accumulated other comprehensive income			5,399	1,654
Other comprehensive income/(loss)	5,030	350	6,096	2,035
Balance at the End of the Period	(17,138)	(27,302)	(17,138)	(27,302)
Net Unrealized Gains/(Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the Beginning of the Period			(18)	(456)
Other comprehensive income before reclassifications	140	82	332	196
Amount reclassified from accumulated other comprehensive income			6	211
Other comprehensive income/(loss)	133	106	338	407
Balance at the End of the Period	320	(49)	320	(49)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the Beginning of the Period			(3,362)	(4,665)
Other comprehensive income before reclassifications			14	160
Other comprehensive income/(loss)	(158)	(234)	14	160
Balance at the End of the Period	(3,347)	(4,505)	(3,347)	(4,505)
Net Change Retirement-Related Benefit Plans
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the Beginning of the Period			(19,854)	(24,216)
Other comprehensive income before reclassifications			352	26
Amount reclassified from accumulated other comprehensive income			5,393	1,442
Other comprehensive income/(loss)	5,056	478	5,745	1,469
Balance at the End of the Period	(14,110)	(22,747)	(14,110)	(22,747)
Net Unrealized Gains/(Losses) on Available-For-Sale Securities
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the Beginning of the Period			(1)	0
Other comprehensive income before reclassifications	0	0	(1)	0
Other comprehensive income/(loss)	0	0	(1)	0
Balance at the End of the Period	$ (1)	$ (1)	$ (1)	$ (1)