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STATEMENTS OF CONSOLIDATED CHANGES IN EQUITY - USD ($) $ in Millions | Total | Series A Preferred Stock | Cumulative Preferred Stock | Cumulative Preferred Stock Series A Preferred Stock | Common Stock | Additional Paid-in-Capital | Retained Earnings | Retained Earnings Series A Preferred Stock | Accumulated Other Comprehensive Loss
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2021 |  |  | 1,000,000 |  |  |  |  |  |
Beginning balance at Dec. 31, 2021 |  |  | $ 790 |  | $ 6 | $ 8,529 | $ 154 |  | $ (64)
Beginning balance (in shares) at Dec. 31, 2021 |  |  |  |  | 629,000,000 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Redemption of Series A Preferred Stock (in shares) |  |  |  | 0 |  |  |  |  |
Redemption of Series A Preferred Stock |  |  |  | $ 0 |  |  |  |  |
Issuances of common stock (in shares) |  |  |  |  | 0 |  |  |  |
Issuances of Common Stock, net of issuance costs |  |  |  |  | $ 0 | 0 |  |  |
Issuance related to benefit and investment plans (in shares) |  |  |  |  | 1,000,000 |  |  |  |
Issuances related to benefit and investment plans |  |  |  |  | $ 0 | 39 |  |  |
Net income | $ 1,057 |  |  |  |  |  | 1,057 |  |
Common Stock dividends declared (see Note 11) |  |  |  |  |  |  | (453) |  |
Series A Preferred stock dividends declared |  |  |  |  |  |  |  | $ (49) |
Other comprehensive income (loss) | 33 |  |  |  |  |  |  |  | 33
Ending balance (in shares) at Dec. 31, 2022 |  | 800,000 | 1,000,000 |  |  |  |  |  |
Ending balance at Dec. 31, 2022 | 10,042 |  | $ 790 |  | $ 6 | 8,568 | 709 |  | (31)
Ending balance (in shares) at Dec. 31, 2022 |  |  |  |  | 630,000,000 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Redemption of Series A Preferred Stock (in shares) |  |  |  | (1,000,000) |  |  |  |  |
Redemption of Series A Preferred Stock |  |  |  | $ (790) |  |  |  |  |
Issuances of common stock (in shares) |  |  |  |  | 0 |  |  |  |
Issuances of Common Stock, net of issuance costs |  |  |  |  | $ 0 | 0 |  |  |
Issuance related to benefit and investment plans (in shares) |  |  |  |  | 1,000,000 |  |  |  |
Issuances related to benefit and investment plans |  |  |  |  | $ 0 | 36 |  |  |
Net income | 917 |  |  |  |  |  | 917 |  |
Common Stock dividends declared (see Note 11) |  |  |  |  |  |  | (492) |  |
Series A Preferred stock dividends declared |  |  |  |  |  |  |  | (42) |
Other comprehensive income (loss) | (4) |  |  |  |  |  |  |  | (4)
Ending balance (in shares) at Dec. 31, 2023 |  | 0 | 0 |  |  |  |  |  |
Ending balance at Dec. 31, 2023 | $ 9,667 |  | $ 0 |  | $ 6 | 8,604 | 1,092 |  | (35)
Ending balance (in shares) at Dec. 31, 2023 | 631,225,829 |  |  |  | 631,000,000 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Redemption of Series A Preferred Stock (in shares) |  |  |  | 0 |  |  |  |  |
Redemption of Series A Preferred Stock |  |  |  | $ 0 |  |  |  |  |
Issuances of common stock (in shares) |  |  |  |  | 19,000,000 |  |  |  |
Issuances of Common Stock, net of issuance costs |  |  |  |  | $ 0 | 494 |  |  |
Issuance related to benefit and investment plans (in shares) |  |  |  |  | 2,000,000 |  |  |  |
Issuances related to benefit and investment plans |  |  |  |  | $ 0 | 7 |  |  |
Net income | $ 1,019 |  |  |  |  |  | 1,019 |  |
Common Stock dividends declared (see Note 11) |  |  |  |  |  |  | (539) |  |
Series A Preferred stock dividends declared |  |  |  |  |  |  |  | $ 0 |
Other comprehensive income (loss) | 18 |  |  |  |  |  |  |  | 18
Ending balance (in shares) at Dec. 31, 2024 |  | 0 | 0 |  |  |  |  |  |
Ending balance at Dec. 31, 2024 | $ 10,666 |  | $ 0 |  | $ 6 | $ 9,105 | $ 1,572 |  | $ (17)
Ending balance (in shares) at Dec. 31, 2024 | 651,727,276 |  |  |  | 652,000,000 |  |  |  |

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