Equity, Reclassification Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]
Other income, net		$ 380	$ 499	$ 502
Revenues	[1]	122,687	129,881	144,766
Total before tax		3,005	3,698	11,768
Tax benefit (expense)		(759)	(692)	(2,619)
Net income		2,246	3,006	9,149
Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]
Net income		(16)	114	17
Net Gain (Loss) on Pension and Other Postretirement Benefits [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]
Total before tax		4	14	32
Tax benefit (expense)		(1)	(4)	(8)
Net income		3	10	24
Net Actuarial Gain [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]
Other income, net		16	9	12
Prior Service (Cost) Credit [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]
Other income, net		(6)	10	22
Settlement Loss [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]
Other income, net		(6)	(5)	(2)
Gains (Losses) on Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]
Total before tax		(21)	117	(8)
Tax benefit (expense)		2	(13)	1
Net income		(19)	104	(7)
Gains (Losses) on Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Commodity Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]
Revenues		$ (21)	$ 117	$ (8)

[1] Includes excise taxes on sales by certain of our foreign operations of $6,748 million, $5,907 million, and $5,765 million for the years ended December 31, 2025, 2024, and 2023.