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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, 2025
Mar. 31, 2024
Segment Reporting Information [Line Items]    
Share-based plans $ (135) $ (119)
Research and development expense, net (844) (868)
Unallocated items, eliminations and other    
Segment Reporting Information [Line Items]    
Share-based plans (30) 10
Deferred compensation 5 (30)
Amortization of previously capitalized interest (21) (23)
Research and development expense, net (82) (89)
Eliminations and other unallocated items (234) (180)
Unallocated items, eliminations and other $ (362) $ (312)