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CONDENSED STATEMENTS OF CONSOLIDATED CHANGES IN EQUITY (Unaudited) - CERC - USD ($) $ in Millions | Total | Common Stock | Additional Paid-in-Capital | Retained Earnings | Accumulated Other Comprehensive Loss | CERC | CERC Common Stock | CERC Additional Paid-in-Capital | CERC Retained Earnings | CERC Accumulated Other Comprehensive Loss
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2023 |  | 631,000,000 |  |  |  |  | 1,000 |  |  |
Beginning balance at Dec. 31, 2023 |  | $ 6 | $ 8,604 | $ 1,092 | $ (35) |  | $ 0 | $ 4,229 | $ 1,634 | $ 16
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Net income | $ 350 |  |  | 350 |  | $ 264 |  |  | 264 |
Dividend to parent |  |  |  |  |  |  |  |  | (115) |
Other comprehensive income (loss) | 2 |  |  |  | 2 | (1) |  |  |  | (1)
Ending balance (in shares) at Mar. 31, 2024 |  | 633,000,000 |  |  |  |  | 1,000 |  |  |
Ending balance at Mar. 31, 2024 | $ 9,998 | $ 6 | 8,583 | 1,442 | (33) | 6,027 | $ 0 | 4,229 | 1,783 | 15
Beginning balance (in shares) at Dec. 31, 2024 | 651,727,276 | 652,000,000 |  |  |  |  | 1,000 |  |  |
Beginning balance at Dec. 31, 2024 | $ 10,666 | $ 6 | 9,105 | 1,572 | (17) | 6,268 | $ 0 | 4,519 | 1,732 | 17
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Net income | 297 |  |  | 297 |  | 305 |  |  | 305 |
Dividend to parent |  |  |  |  |  |  |  |  | (97) |
Other comprehensive income (loss) | $ 0 |  |  |  | 0 | 0 |  |  |  | 0
Ending balance (in shares) at Mar. 31, 2025 | 652,726,754 | 652,000,000 |  |  |  |  | 1,000 |  |  |
Ending balance at Mar. 31, 2025 | $ 10,955 | $ 6 | $ 9,097 | $ 1,869 | $ (17) | $ 6,476 | $ 0 | $ 4,519 | $ 1,940 | $ 17

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