v3.26.3
Exit Activities and Asset Sales (Schedule of Retention Benefit Liability Roll Forward) (Details) - Retention Benefits - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Restructuring Reserve [Roll Forward]        
Retention benefit liability at beginning of period     $ 2 $ 14
Costs deferred as a regulatory asset2 $ 4 $ 1 11 4
Costs paid or settled     (11) 0
Retention benefit liability at the end of the period $ 2 $ 18 $ 2 $ 18