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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Cash and cash equivalents | $ 114 | $ 74
Accounts receivable, less allowance for credit losses | 874 | 889
Allowance for credit losses | 43 | 38
Accrued unbilled revenues, allowance for credit losses | 3 | 4
Prepaid expenses and other current assets | 147 | 171
Regulatory assets | $ 2,499 | $ 2,193
Preferred Stock [Abstract] |  |
Preferred stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Preferred stock, authorized (in shares) | 20,000,000 | 20,000,000
Preferred stock, outstanding (in shares) | 800,000 | 800,000
Preferred stock aggregate liquidation preference | $ 800 | $ 800
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) | 631,018,976 | 629,535,631
Variable Interest Entity, Primary Beneficiary |  |
Cash and cash equivalents | $ 110 | $ 75
Accounts receivable, less allowance for credit losses | 18 | 22
Prepaid expenses and other current assets | 12 | 13
Regulatory assets | $ 199 | $ 229

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