CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Cash and cash equivalents	$ 639	$ 38
Accounts receivable, less allowance for credit losses	872	806
Allowance for credit losses	29	25
Accrued unbilled revenues, allowance for credit losses	1	2
Prepaid expenses and other current assets	125	140
Regulatory assets	3,610	3,005
Taxes accrued	208	344
Interest accrued	278	313
Customer deposits	89	89
Other current liabilities	430	566
Deferred income taxes	$ (4,692)	$ (4,602)
Common Stock [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, outstanding (in shares)	654,163,245	652,869,575
Common Stock Shares Issued Not Disclosed	true	true
Variable Interest Entity, Primary Beneficiary
Cash and cash equivalents	$ 54	$ 34
Accounts receivable, less allowance for credit losses	14	6
Accrued unbilled revenues, after allowance for credit losses, current	10	4
Prepaid expenses and other current assets	12	6
Regulatory assets	1,848	683
Taxes accrued	4	4
Interest accrued	21	7
Customer deposits	3	2
Other current liabilities	15	15
Deferred income taxes	$ (4)	$ (6)