Equity Activity - AOCI Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period	$ 33,056	$ 26,953	$ 32,740	$ 27,393
Balance at the end of the period	34,541	27,588	34,541	27,588
Accumulated Other Comprehensive Income/(Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period	(15,415)	(15,575)	(15,713)	(15,269)
Other comprehensive income before reclassifications			(77)	(445)
Amount reclassified from accumulated other comprehensive income			639	(328)
Other comprehensive income/(loss)	263	(466)	562	(772)
Balance at the end of the period	(15,151)	(16,041)	(15,151)	(16,041)
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			(31)	(354)
Amount reclassified from accumulated other comprehensive income			0	0
Other comprehensive income/(loss)	(51)	(215)	(31)	(354)
Balance at the end of the period	(3,988)	(3,865)	(3,988)	(3,865)
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	2
Amount reclassified from accumulated other comprehensive income			0	0
Other comprehensive income/(loss)	0	(4)	0	2
Balance at the end of the period	(1)	2	(1)	2
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	87	(59)	(46)	(101)
Amount reclassified from accumulated other comprehensive income			331	(555)
Other comprehensive income/(loss)	161	(373)	285	(656)
Balance at the end of the period	128	(419)	128	(419)
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	8
Amount reclassified from accumulated other comprehensive income			308	228
Other comprehensive income/(loss)	154	125	309	236
Balance at the end of the period	$ (11,291)	$ (11,759)	$ (11,291)	$ (11,759)