Retirement Programs - Comparative Funded Status (Details) - Pensions - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Change in Benefit Obligation ("PBO")
Fair value of plan assets, December 31	$ 8,228	$ 7,685
Non-U.S.
Change in Benefit Obligation ("PBO")
Benefit obligation, December 31	6,385	5,586	$ 9,398
Fair value of plan assets, December 31	6,178	5,794	$ 7,968
Funded Status, End of Year	(207)	208
United Kingdom
Change in Benefit Obligation ("PBO")
Benefit obligation, December 31	3,616	3,100
Fair value of plan assets, December 31	3,858	3,625
Funded Status, End of Year	242	525
Germany
Change in Benefit Obligation ("PBO")
Benefit obligation, December 31	1,684	1,485
Fair value of plan assets, December 31	1,370	1,285
Funded Status, End of Year	(314)	(200)
Other Non-U.S.
Change in Benefit Obligation ("PBO")
Benefit obligation, December 31	1,085	1,001
Fair value of plan assets, December 31	950	884
Funded Status, End of Year	$ (135)	$ (117)

Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans.

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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 asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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