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Share Capital (Schedule of Common Stock Issued and Outstanding) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Class Of Stock [Line Items]      
Shares of Common Stock Outstanding, Beginning of Year 260,400,000 271,700,000 245,700,000
Shares of Common Stock Purchased (7,800,000) (12,700,000) (9,900,000)
Shares of Common Stock Issued 700,000 1,400,000 35,900,000
Shares of Common Stock Outstanding, End of Year 253,300,000 260,400,000 271,700,000
Shares of Common Stock Outstanding, Beginning of Year $ 3 $ 3 $ 3
Shares of Common Stock Purchased (307) (597) (426)
Shares of Common Stock Issued     1,169
Shares of Common Stock Outstanding, End of Year 3 3 3
Share Capital [Member]      
Class Of Stock [Line Items]      
Shares of Common Stock Purchased 0 0 0
Shares of Common Stock Issued $ 0 $ 0 $ 0