Postretirement Benefit Plans - Schedule of Change in AOCI (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)
Defined benefit plan amounts recognized in other comprehensive income net actuarial loss portion roll forward
AOCI balance, net actuarial loss portion (net of taxes), beginning of period	$ 144
Adjustments, net actuarial loss	(79)
Recognized within net income, net actuarial loss	(18)
Tax effect, net actuarial loss	24
Total change to AOCI, net actuarial loss	(73)
AOCI balance, net actuarial loss portion (net of taxes), period end	71
Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Prior Service Costs Portion Roll Forward
AOCI balance, net prior service cost (net of taxes), beginning of period	(1)
Adjustments, prior service cost	24
Recognized within net income, prior service cost	(1)
Tax effect, prior service cost	(6)
Total change to AOCI, prior service credit	17
AOCI balance, net prior service cost (net of taxes), period end	16
U.S. | Defined Benefit
Defined benefit plan amounts recognized in other comprehensive income net actuarial loss portion roll forward
AOCI balance, net actuarial loss portion (net of taxes), beginning of period	57
Adjustments, net actuarial loss	(17)
Recognized within net income, net actuarial loss	(16)
Tax effect, net actuarial loss	7
Total change to AOCI, net actuarial loss	(26)
AOCI balance, net actuarial loss portion (net of taxes), period end	31
Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Prior Service Costs Portion Roll Forward
AOCI balance, net prior service cost (net of taxes), beginning of period	0
Adjustments, prior service cost	0
Recognized within net income, prior service cost	0
Tax effect, prior service cost	0
Total change to AOCI, prior service credit	0
AOCI balance, net prior service cost (net of taxes), period end	0
U.S. | Retiree Health Care
Defined benefit plan amounts recognized in other comprehensive income net actuarial loss portion roll forward
AOCI balance, net actuarial loss portion (net of taxes), beginning of period	(26)
Adjustments, net actuarial loss	(3)
Recognized within net income, net actuarial loss	1
Tax effect, net actuarial loss	1
Total change to AOCI, net actuarial loss	(1)
AOCI balance, net actuarial loss portion (net of taxes), period end	(27)
Non-U.S. | Defined Benefit
Defined benefit plan amounts recognized in other comprehensive income net actuarial loss portion roll forward
AOCI balance, net actuarial loss portion (net of taxes), beginning of period	113
Adjustments, net actuarial loss	(59)
Recognized within net income, net actuarial loss	(3)
Tax effect, net actuarial loss	16
Total change to AOCI, net actuarial loss	(46)
AOCI balance, net actuarial loss portion (net of taxes), period end	67
Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Prior Service Costs Portion Roll Forward
AOCI balance, net prior service cost (net of taxes), beginning of period	(1)
Adjustments, prior service cost	24
Recognized within net income, prior service cost	(1)
Tax effect, prior service cost	(6)
Total change to AOCI, prior service credit	17
AOCI balance, net prior service cost (net of taxes), period end	$ 16