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Consolidated Statements of Changes in Shareholders Equity (Unaudited) - ComEd - USD ($) $ in Millions | Total | Retained Earnings | Commonwealth Edison Co | Commonwealth Edison Co Common Stock | Commonwealth Edison Co Other Paid-in-Capital [Member] | Commonwealth Edison Co Retained Earnings
--- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2022 |  |  | $ 13,364 | $ 1,588 | $ 9,746 | $ 2,030
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | $ 669 | $ 669 | 241 |  |  | 241
Common stock dividends | (359) | (359) | (187) |  |  | (187)
Contributions from parent |  |  | 186 |  | 186 |
Ending Balance at Mar. 31, 2023 |  |  | 13,604 | 1,588 | 9,932 | 2,084
Beginning Balance at Dec. 31, 2022 |  |  | 13,364 | 1,588 | 9,746 | 2,030
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 1,711 |  | 822 |  |  |
Ending Balance at Sep. 30, 2023 |  |  | 14,198 | 1,588 | 10,316 | 2,294
Beginning Balance at Mar. 31, 2023 |  |  | 13,604 | 1,588 | 9,932 | 2,084
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 343 | 343 | 249 |  |  | 249
Common stock dividends | (359) | (359) | (187) |  |  | (187)
Contributions from parent |  |  | 186 |  | 186 |
Ending Balance at Jun. 30, 2023 |  |  | 13,852 | 1,588 | 10,118 | 2,146
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 700 | 700 | 333 |  |  | 333
Common stock dividends | (358) | (358) | (185) |  |  | (185)
Contributions from parent |  |  | 198 |  | 198 |
Ending Balance at Sep. 30, 2023 |  |  | 14,198 | 1,588 | 10,316 | 2,294
Beginning Balance at Dec. 31, 2023 | 25,755 |  | 14,363 | 1,588 | 10,401 | 2,374
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 658 | 658 | 193 |  |  | 193
Common stock dividends | (381) | (381) | (194) |  |  | (194)
Contributions from parent |  |  | 39 |  | 39 |
Ending Balance at Mar. 31, 2024 |  |  | 14,401 | 1,588 | 10,440 | 2,373
Beginning Balance at Dec. 31, 2023 | 25,755 |  | 14,363 | 1,588 | 10,401 | 2,374
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 1,813 |  | 823 |  |  |
Ending Balance at Sep. 30, 2024 | 26,622 |  | 14,721 | 1,588 | 10,518 | 2,615
Beginning Balance at Mar. 31, 2024 |  |  | 14,401 | 1,588 | 10,440 | 2,373
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 448 | 448 | 270 |  |  | 270
Common stock dividends | (380) | (380) | (194) |  |  | (194)
Contributions from parent |  |  | 39 |  | 39 |
Ending Balance at Jun. 30, 2024 |  |  | 14,516 | 1,588 | 10,479 | 2,449
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 707 | 707 | 360 |  |  | 360
Common stock dividends | (381) | $ (381) | (194) |  |  | (194)
Contributions from parent |  |  | 39 |  | 39 |
Ending Balance at Sep. 30, 2024 | $ 26,622 |  | $ 14,721 | $ 1,588 | $ 10,518 | $ 2,615

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