Share-Based Compensation Restricted Stock (Details) - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	658	586	395
Compensation costs for share-based payments included in O&M	$ 33	$ 25	$ 20