CONSOLIDATED BALANCE SHEET (UNAUDITED) (Parenthetical) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Statement of Financial Position [Abstract]
Accounts receivable – customers, net allowance for uncollectible accounts	$ 468	$ 507
Other receivables, less allowance for uncollectible accounts	10	35
Non-utility property, less accumulated depreciation	$ 25	$ 25
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	500	500
Common stock, shares outstanding (in shares)		361
Common Stock, Shares, Issued (in shares)	368	361
Treasury stock, par value (in dollars per share)	$ 0.10	$ 0.10
Treasury shares (in shares)	34	34