Equity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity beginning balance	$ 61,923	$ 61,410
Other comprehensive income (loss) before reclassifications, net	610	(209)
Amounts reclassified, pre-tax	(42)	(36)
Tax benefit (expense)	(20)	29
Equity ending balance	63,307	62,100
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity beginning balance	(3,755)	(2,419)
Equity ending balance	(3,207)	(2,635)
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity beginning balance	(949)	(440)
Other comprehensive income (loss) before reclassifications, net	499	(121)
Amounts reclassified, pre-tax	0	0
Tax benefit (expense)	1	(1)
Equity ending balance	(449)	(562)
Defined Benefit Pension and Postretirement Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity beginning balance	(2,679)	(2,026)
Other comprehensive income (loss) before reclassifications, net	(36)	(7)
Amounts reclassified, pre-tax	(39)	(44)
Tax benefit (expense)	9	12
Equity ending balance	(2,745)	(2,065)
Unrealized Hedging Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity beginning balance	(127)	47
Other comprehensive income (loss) before reclassifications, net	147	(81)
Amounts reclassified, pre-tax	(3)	8
Tax benefit (expense)	(30)	18
Equity ending balance	$ (13)	$ (8)