Pensions Benefit Plans and Other Postretirement Benefits - Changes in Fair Value of Pension Plan Assets (Details) - Pension Benefit Plans. - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
U.S.
Changes in fair value of pension plan assets
Fair value at beginning of year	$ 812	$ 1,168
Actual gain (loss) on plan assets	94	(256)
Benefit payments	(70)	(90)
Employer contributions	1	10
Settlements		(20)
Net change in fair value of assets	25	(356)
Fair value at end of year	837	812
Non-U.S.
Changes in fair value of pension plan assets
Fair value at beginning of year	547	923
Actual gain (loss) on plan assets	27	(255)
Benefit payments	(41)	(42)
Employer contributions	31	16
Settlements	(31)	(17)
Foreign currency translation	31	(79)
Other		1
Net change in fair value of assets	17	(376)
Fair value at end of year	$ 564	$ 547