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CONSOLIDATED STATEMENT OF EQUITY - CECONY (UNAUDITED) - USD ($) shares in Millions, $ in Millions | Total | Subsidiaries | Common Stock | Common Stock Subsidiaries | Additional Paid-In Capital Subsidiaries | Retained Earnings | Retained Earnings Subsidiaries | Repurchased Con Edison Stock Subsidiaries | Capital Stock Expense Subsidiaries | Accumulated Other Comprehensive Income/(Loss) | Accumulated Other Comprehensive Income/(Loss) Subsidiaries
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance (shares) at Dec. 31, 2020 |  |  | 342 | 235 |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2020 |  | $ 14,849 |  | $ 589 | $ 6,169 |  | $ 9,122 | $ (962) | $ (62) |  | $ (7)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income | $ 419 | 465 |  |  |  |  | 465 |  |  |  |
Common stock dividends | (265) | (247) |  |  |  | $ (265) | (247) |  |  |  |
Capital contribution by parent |  | 125 |  |  | 125 |  |  |  |  |  |
Other comprehensive income | 4 |  |  |  |  |  |  |  |  | $ 4 |
Ending Balance (shares) at Mar. 31, 2021 |  |  | 342 | 235 |  |  |  |  |  |  |
Ending Balance at Mar. 31, 2021 |  | 15,192 |  | $ 589 | 6,294 |  | 9,340 | (962) | (62) |  | (7)
Beginning Balance (shares) at Dec. 31, 2021 |  |  | 354 | 235 |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2021 | 20,037 | 16,312 |  | $ 589 | 7,269 |  | 9,478 | (962) | (62) |  | 0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income | 602 | 475 |  |  |  |  | 475 |  |  |  |
Common stock dividends | (280) | (245) |  |  |  | $ (280) | (245) |  |  |  |
Capital contribution by parent |  | 75 |  |  | 75 |  |  |  |  |  |
Other comprehensive income | 0 | 1 |  |  |  |  |  |  |  |  | 1
Ending Balance (shares) at Mar. 31, 2022 |  |  | 354 | 235 |  |  |  |  |  |  |
Ending Balance at Mar. 31, 2022 | $ 20,378 | $ 16,618 |  | $ 589 | $ 7,344 |  | $ 9,708 | $ (962) | $ (62) |  | $ 1

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