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Leases (Lease Cost) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Leases [Abstract]        
Operating lease cost $ 9 $ 7 $ 17 $ 15
Variable lease cost 1 1 3 2
Total lease cost $ 10 $ 8 $ 20 $ 17