Pension, Savings and Other Postretirement Benefit Plans - Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Pension Plans | U.S.
Defined Benefit Plan Disclosure [Line Items]
Prior service cost (credit)	$ 0	$ 0
Net actuarial loss (gain)	1,449	1,690
Gross amount recorded	1,449	1,690
Deferred income taxes	118	118
Minority shareholders’ equity	0	0
Net amount recorded	1,567	1,808
Pension Plans | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Prior service cost (credit)	17	17
Net actuarial loss (gain)	502	492
Gross amount recorded	519	509
Deferred income taxes	(65)	(64)
Minority shareholders’ equity	(1)	(2)
Net amount recorded	453	443
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service cost (credit)	(22)	(29)
Net actuarial loss (gain)	(76)	(86)
Gross amount recorded	(98)	(115)
Deferred income taxes	5	4
Minority shareholders’ equity	0	0
Net amount recorded	$ (93)	$ (111)