Consolidated Statement of Capitalization - USD ($) shares in Millions, $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Regulated Operations [Abstract]
TOTAL EQUITY BEFORE ACCUMULATED OTHER COMPREHENSIVE LOSS (in shares)	347	345
TOTAL EQUITY BEFORE ACCUMULATED OTHER COMPREHENSIVE INCOME	$ 21,933	$ 21,136
Pension and other postretirement benefit plan liability adjustments, net of taxes	30	23
Unrealized losses on derivatives qualified as cash flow hedges, less reclassification adjustment for gains (losses) included in net income and reclassification adjustment for unrealized losses included in regulatory assets, net of taxes	(1)	(1)
TOTAL ACCUMULATED OTHER COMPREHENSIVE INCOME, NET OF TAXES	29	22
SHAREHOLDERS' EQUITY	$ 21,962	$ 21,158	$ 20,889	$ 20,336