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Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions | Total | Sun Edison Inc | NRG Energy, Inc | Common Units | Convertible Preferred Units | Common Stock | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Total Common Shareholders' Equity | Noncontrolling Interests | Noncontrolling Interests Sun Edison Inc | Noncontrolling Interests NRG Energy, Inc | Noncontrolling Interests Common Units | Noncontrolling Interests Convertible Preferred Units
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2015 |  | $ 13,602 |  |  |  |  | $ 6,680 | $ 6,458 | $ (474) | $ 12,664 | $ 938 |  |  |  |
Beginning balance (in shares) at Dec. 31, 2015 |  |  |  |  |  |  | 596 |  |  |  |  |  |  |  |
Net income including noncontrolling interests |  | 2,212 |  |  |  |  |  | 2,123 |  | 2,123 | 89 |  |  |  |
Sale of interest in merchant solar projects |  | 139 |  |  |  |  | $ 22 |  |  | 22 | 117 |  |  |  |
Contributions to Four Brothers and Three Cedars |  |  | $ 189 |  |  |  |  |  |  |  |  | $ 189 |  |  |
Purchase of Dominion Energy Midstream common units |  | (17) |  |  |  |  | (3) |  |  | (3) | (14) |  |  |  |
Issuance of common stock |  | 2,152 |  |  |  |  | $ 2,152 |  |  | 2,152 |  |  |  |  |
Issuance of common stock (in shares) |  |  |  |  |  |  | 32 |  |  |  |  |  |  |  |
Sale of Dominion Energy Midstream common units - net of offering costs |  |  |  |  | $ 482 | $ 490 |  |  |  |  |  |  |  | $ 482 | $ 490
Stock awards (net of change in unearned compensation) |  | 14 |  |  |  |  | $ 14 |  |  | 14 |  |  |  |  |
Present value of stock purchase contract payments related to RSNs | [1] | (191) |  |  |  |  | (191) |  |  | (191) |  |  |  |  |
Tax effect of Dominion Energy Questar Pipeline contribution to Dominion Energy Midstream |  | (116) |  |  |  |  | (116) |  |  | (116) |  |  |  |  |
Dividends and distributions |  | (1,789) |  |  |  |  |  | (1,727) |  | (1,727) | (62) |  |  |  |
Other comprehensive income (loss), net of tax |  | (325) |  |  |  |  |  |  | (325) | (325) |  |  |  |  |
Other |  | (2) |  |  |  |  | (8) |  |  | (8) | 6 |  |  |  |
Ending balance at Dec. 31, 2016 |  | 16,840 |  |  |  |  | $ 8,550 | 6,854 | (799) | 14,605 | 2,235 |  |  |  |
Ending Balance (in shares) at Dec. 31, 2016 |  |  |  |  |  |  | 628 |  |  |  |  |  |  |  |
Net income including noncontrolling interests |  | 3,120 |  |  |  |  |  | 2,999 |  | 2,999 | 121 |  |  |  |
Contributions to Four Brothers and Three Cedars |  |  |  | $ 9 |  |  |  |  |  |  |  |  | $ 9 |  |
Issuance of common stock |  | 1,302 |  |  |  |  | $ 1,302 |  |  | 1,302 |  |  |  |  |
Issuance of common stock (in shares) |  |  |  |  |  |  | 17 |  |  |  |  |  |  |  |
Sale of Dominion Energy Midstream common units - net of offering costs |  |  |  |  | $ 18 |  |  |  |  |  |  |  |  | $ 18 |
Stock awards (net of change in unearned compensation) |  | 22 |  |  |  |  | $ 22 |  |  | 22 |  |  |  |  |
Dividends and distributions |  | (2,087) |  |  |  |  |  | (1,931) |  | (1,931) | (156) |  |  |  |
Other comprehensive income (loss), net of tax |  | 141 |  |  |  |  |  |  | 140 | 140 | 1 |  |  |  |
Other |  | 5 |  |  |  |  | (9) | 14 |  | 5 |  |  |  |  |
Ending balance at Dec. 31, 2017 |  | 19,370 |  |  |  |  | $ 9,865 | 7,936 | (659) | 17,142 | 2,228 |  |  |  |
Ending Balance (in shares) at Dec. 31, 2017 |  |  |  |  |  |  | 645 |  |  |  |  |  |  |  |
Cumulative-effect of changes in accounting principles |  | 6 |  |  |  |  | $ (127) | 1,029 | (1,023) | (121) | 127 |  |  |  |
Net income including noncontrolling interests |  | 2,549 |  |  |  |  |  | 2,447 |  | 2,447 | 102 |  |  |  |
Issuance of common stock |  | 2,461 |  |  |  |  | $ 2,461 |  |  | 2,461 |  |  |  |  |
Issuance of common stock (in shares) |  |  |  |  |  |  | 36 |  |  |  |  |  |  |  |
Sale of Dominion Energy Midstream common units - net of offering costs |  | 4 |  |  |  |  |  |  |  |  | 4 |  |  |  |
Remeasurement of noncontrolling interest in Dominion Energy Midstream |  |  |  |  |  |  | $ 375 |  |  | 375 | (375) |  |  |  |
Stock awards (net of change in unearned compensation) |  | 22 |  |  |  |  | 22 |  |  | 22 |  |  |  |  |
Dividends and distributions |  | (2,331) |  |  |  |  |  | (2,185) |  | (2,185) | (146) |  |  |  |
Other comprehensive income (loss), net of tax |  | (17) |  |  |  |  |  |  | (18) | (18) | 1 |  |  |  |
Other |  | (16) |  |  |  |  | (8) | (8) |  | (16) |  |  |  |  |
Ending balance at Dec. 31, 2018 |  | $ 22,048 |  |  |  |  | $ 12,588 | $ 9,219 | $ (1,700) | $ 20,107 | $ 1,941 |  |  |  |
Ending Balance (in shares) at Dec. 31, 2018 |  |  |  |  |  |  | 681 |  |  |  |  |  |  |  |
[1] | See Note 17 for further information.

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