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Pension and Other Postretirement Benefits - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Multiemployer plans, additional expense		$ 6	$ 6	$ 5
Actuarial gain		25
Amounts of common stock included in plan assets			297
Total contributions		13	14	13
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected contributions		20
Pension Plan | Foreign Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amount of irrevocable transfer	$ 119	122	8
Settlement charge	47	44	0	$ 0
Employer contributions			17
Actuarial gain		7	(18)
Pension Plan | U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amount of irrevocable transfer	740	775	0
Settlement charge	469
Employer contributions	$ 100	125	2
Plan obligations settled		35
Actuarial gain		$ 15	$ (36)

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Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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