Retirement Benefits - Accumulated and Projected Benefit Obligations for the Plans (Details) - Pension Benefit Plans - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
United States
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 3,755	$ 3,928
Projected benefit obligation	3,755	3,928
Fair value of plan assets	3,249	3,273
Non U.S.
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	1,162	1,346
Projected benefit obligation	1,163	1,347
Fair value of plan assets	$ 1,083	$ 1,172

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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 projected benefit obligation 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.

+ References

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

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