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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Effective Income Tax Rate Reconciliation [Line Items]        
Asset impairments $ 0 $ 1,486 $ 0 $ 1,486
Impairment losses   1,100    
Engineered Materials        
Effective Income Tax Rate Reconciliation [Line Items]        
Impairment losses   $ 1,000