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Leases (Leases Cost) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]      
Operating lease cost $ 75 $ 85 $ 85
Variable lease cost 32 28 26
Sublease income (3) (4) (4)
Total lease cost $ 104 $ 109 $ 107