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CONSOLIDATED BALANCE SHEET (UNAUDITED) (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Statement of Financial Position [Abstract]    
Accounts receivable - customers, allowance for uncollectible accounts $ 336 $ 317
Other receivables, allowance for uncollectible accounts 25 22
Non-utility property, accumulated depreciation 660 626
Intangible assets, accumulated amortization $ 320 $ 297