v3.26.1
Exit Activities and Asset Sales (Schedule of Retention Benefit Liability Roll Forward) (Details) - Retention Benefits - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Restructuring Reserve [Roll Forward]    
Retention benefit liability at beginning of period $ 2 $ 14
Costs deferred as a regulatory asset 7 3
Costs paid or settled (7) 0
Retention benefit liability at the end of the period $ 2 $ 17