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Segment and Revenue Information - Schedule of Segment, Reconciliation of Other Items from Segments to Consolidated (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Segment Reporting Information [Line Items]    
Share-based plans $ (119) $ (222)
Research and development expense, net (868) (741)
Unallocated items, eliminations and other    
Segment Reporting Information [Line Items]    
Share-based plans 10 (52)
Deferred compensation (30) (54)
Amortization of previously capitalized interest (23) (23)
Research and development expense, net (89) (76)
Eliminations and other unallocated items (180) (255)
Unallocated items, eliminations and other $ (312) $ (460)