Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Pretax Amounts Included in Accumulated OCI (Details)

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Employee Benefit Plans - Pretax Amounts Included in Accumulated OCI (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial loss (gain) $ 5,696 $ 4,830
Prior service cost (credits) 42 14
Amounts recognized in accumulated OCI 5,738 4,844
U.S. | Postretirement Health and Life Plans    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial loss (gain) (187) 4
Prior service cost (credits) (1) (3)
Amounts recognized in accumulated OCI (188) 1
Non-U.S. | Pension Plan    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial loss (gain) 312 456
Prior service cost (credits) 43 17
Amounts recognized in accumulated OCI 355 473
Qualified | U.S. | Pension Plan    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial loss (gain) 4,775 3,425
Prior service cost (credits) 0 0
Amounts recognized in accumulated OCI 4,775 3,425
Nonqualified | U.S. | Other Pension Plan    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial loss (gain) 796 945
Prior service cost (credits) 0 0
Amounts recognized in accumulated OCI $ 796 $ 945