Equity Activity - AOCI Rollforward (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period	$ 32,740	$ 27,393
Balance at the end of the period	33,056	26,953
Accumulated Other Comprehensive Income/(Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period	(15,713)	(15,269)
Other comprehensive income before reclassifications	(113)	(176)
Amount reclassified from accumulated other comprehensive income	412	(130)
Other comprehensive income/(loss)	299	(306)
Balance at the end of the period	(15,415)	(15,575)
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period	(3,956)	(3,512)
Other comprehensive income before reclassifications	20	(139)
Amount reclassified from accumulated other comprehensive income	0	0
Other comprehensive income/(loss)	20	(139)
Balance at the end of the period	(3,936)	(3,651)
Net Unrealized Gains/(Losses) on Available- For-Sale Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period	0	0
Other comprehensive income before reclassifications	0	6
Amount reclassified from accumulated other comprehensive income	0	0
Other comprehensive income/(loss)	0	6
Balance at the end of the period	(1)	6
Net Unrealized Gains/(Losses) on Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period	(157)	237
Other comprehensive income before reclassifications	(133)	(42)
Amount reclassified from accumulated other comprehensive income	258	(241)
Other comprehensive income/(loss)	124	(283)
Balance at the end of the period	(32)	(46)
Net Change Retirement- Related Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period	(11,600)	(11,994)
Other comprehensive income before reclassifications	1	0
Amount reclassified from accumulated other comprehensive income	154	111
Other comprehensive income/(loss)	155	111
Balance at the end of the period	$ (11,445)	$ (11,884)