Pension and Other Postretirement Benefits - Schedule of Pension Plan Benefit Obligations (Details) - Pension benefits - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 1,496	$ 1,592	$ 1,599
Accumulated benefit obligation	1,495	1,591
The aggregate projected benefit obligation and fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets were as follows:
Projected benefit obligation	1,380	1,459
Fair value of plan assets	739	780
The aggregate accumulated benefit obligation and fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets were as follows:
Accumulated benefit obligation	1,379	1,459
Fair value of plan assets	$ 739	$ 780

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

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-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-Publisher FASB
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Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets.

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Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
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-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147480482/715-20-55-17

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Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets.

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