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Restructuring Costs (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Restructuring and Related Activities [Abstract]          
Restructuring program term 3 years   3 years    
Restructuring and related cost, expected cost $ 500   $ 500    
Restructuring costs incurred 38        
Restructuring charges $ 46 $ 54 $ 96 $ 140 $ 276