Pensions And Other Postretirement Benefits - Accumulated Benefit Obligations and Projected Benefit Obligations (Details) - Pension Plan - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
U.S.
ABO and PBO [Line Items]
ABO	$ 44,798	$ 60,188
Plans with ABO in Excess of Plan Assets [Abstract]
ABO	5,668	8,396
Fair Value of Plan Assets	4,214	6,233
Plans with PBO in Excess of Plan Assets [Abstract]
PBO	5,687	8,415
Fair Value of Plan Assets	4,214	6,223
Non-U.S.
ABO and PBO [Line Items]
ABO	12,505	18,244
Plans with ABO in Excess of Plan Assets [Abstract]
ABO	4,739	6,464
Fair Value of Plan Assets	211	300
Plans with PBO in Excess of Plan Assets [Abstract]
PBO	4,815	6,533
Fair Value of Plan Assets	$ 211	$ 300

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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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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Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets.

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