Equity Activity - AOCI Rollforward (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the Beginning of the Period	$ 22,021	$ 18,996
Other comprehensive income/(loss)	(40)	703
Balance at the End of the Period	21,672	19,112
Accumulated Other Comprehensive Income/(Loss)
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the Beginning of the Period	(16,740)	(23,234)
Other comprehensive income before reclassifications	(39)	355
Amount reclassified from accumulated other comprehensive income	0	348
Other comprehensive income/(loss)	(40)	703
Balance at the End of the Period	(16,780)	(22,532)
Net Unrealized Gains/(Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the Beginning of the Period	(135)	(18)
Other comprehensive income before reclassifications	(23)	44
Amount reclassified from accumulated other comprehensive income	(90)	0
Other comprehensive income/(loss)	(113)	44
Balance at the End of the Period	(248)	26
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the Beginning of the Period	(3,591)	(3,362)
Other comprehensive income before reclassifications	(30)	306
Other comprehensive income/(loss)	(30)	306
Balance at the End of the Period	(3,621)	(3,056)
Net Change Retirement-Related Benefit Plans
Accumulated Other Comprehensive Income (Loss) (net of tax)
Balance at the Beginning of the Period	(13,013)	(19,854)
Other comprehensive income before reclassifications	2	5
Amount reclassified from accumulated other comprehensive income	90	348
Other comprehensive income/(loss)	92	352
Balance at the End of the Period	(12,921)	(19,502)
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)	(1)
Other comprehensive income before reclassifications	11	0
Other comprehensive income/(loss)	11	0
Balance at the End of the Period	$ 10	$ (1)