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Segment and Revenue Information - Schedule of Unallocated Items and Eliminations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]      
Share-based plans $ (725) $ (833) $ (250)
Deferred compensation 117 (126) (93)
Amortization of previously capitalized interest (89) (76) (81)
Research and development expense, net (2,852) (2,249) (2,476)
Other      
Segment Reporting Information [Line Items]      
Share-based plans (114) (174) (120)
Deferred compensation 117 (126) (93)
Amortization of previously capitalized interest (95) (107) (95)
Research and development expense, net (278) (184) (240)
Eliminations and other unallocated items (1,162) (676) (1,807)
Unallocated items, eliminations and other (1,532) (1,267) (2,355)
FAS/CAS service cost adjustment 1,143 1,173 1,383
Other | Pension FAS/CAS service cost adjustment      
Segment Reporting Information [Line Items]      
FAS/CAS service cost adjustment 849 882 1,024
Other | Postretirement FAS/CAS service cost adjustment      
Segment Reporting Information [Line Items]      
FAS/CAS service cost adjustment $ 294 $ 291 $ 359