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Goodwill and Intangible Assets (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Finite Lived and Indefinite Lived Intangible Assets by Major Class [Line Items]          
Goodwill $ 963,000,000   $ 963,000,000   $ 959,000,000
Goodwill impairment charges     0 $ 0  
Increase to goodwill     4,000,000    
Intangible asset impairment charges     0 0  
Amortization expense $ 12,000,000 $ 12,000,000 $ 24,000,000 $ 25,000,000