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Related Parties - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Related Party Transaction [Line Items]        
Net sales of product $ 2,209 $ 2,161 $ 4,216 $ 4,231
Related Party        
Related Party Transaction [Line Items]        
Net sales of product 23 22 40 42
Cost of sales 15 16 26 31
Related Party | Transition Agreement Services        
Related Party Transaction [Line Items]        
Total operating expenses 97 135 201 272
Related Party | Master Supply Agreements        
Related Party Transaction [Line Items]        
Cost of sales $ 54 $ 58 $ 117 $ 121