Equity Activity - AOCI Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period	$ 23,333	$ 21,672	$ 22,613	$ 22,021
Balance at the end of the period	24,103	22,271	24,103	22,271
Accumulated Other Comprehensive Income/(Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period	(18,488)	(16,780)	(18,761)	(16,740)
Other comprehensive income before reclassifications			42	167
Amount reclassified from accumulated other comprehensive income			400	74
Other comprehensive income/(loss)	169	280	442	241
Balance at the end of the period	(18,319)	(16,499)	(18,319)	(16,499)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period			(106)	(135)
Other comprehensive income before reclassifications	75	130	204	107
Amount reclassified from accumulated other comprehensive income			24	(112)
Other comprehensive income/(loss)	45	109	227	(4)
Balance at the end of the period	121	(139)	121	(139)
Accumulated Foreign Currency Adjustment Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period			(3,488)	(3,591)
Other comprehensive income before reclassifications			(165)	52
Other comprehensive income/(loss)	(66)	82	(165)	52
Balance at the end of the period	(3,653)	(3,539)	(3,653)	(3,539)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period			(15,165)	(13,013)
Other comprehensive income before reclassifications			2	9
Amount reclassified from accumulated other comprehensive income			377	185
Other comprehensive income/(loss)	190	102	379	194
Balance at the end of the period	(14,786)	(12,819)	(14,786)	(12,819)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at the beginning of the period			(1)	(1)
Other comprehensive income before reclassifications	0	(12)	1	(1)
Other comprehensive income/(loss)	0	(12)	1	(1)
Balance at the end of the period	$ (1)	$ (2)	$ (1)	$ (2)