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Goodwill And Other Intangibles (Estimated Future Aggregate Amortization Expense) (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]    
2023 (excludes amortization through September 30, 2023) $ 90  
2024 320  
2025 286  
2026 266  
2027 262  
Subsequent years 1,274  
Net Carrying Amount $ 2,498 $ 2,537