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Dominion Energy Gas Holdings, LLC Consolidated Statements of Equity - USD ($) $ in Millions | Total | Dominion Energy Gas Holdings, LLC | Predecessor Equity Dominion Energy Gas Holdings, LLC | Membership Interests Dominion Energy Gas Holdings, LLC | Accumulated Other Comprehensive Income (Loss) | Accumulated Other Comprehensive Income (Loss) Dominion Energy Gas Holdings, LLC | Total Members' Equity | Total Members' Equity Dominion Energy Gas Holdings, LLC | Noncontrolling Interests | Noncontrolling Interests Dominion Energy Gas Holdings, LLC | Common Units | Common Units Dominion Energy Gas Holdings, LLC | Common Units Noncontrolling Interests | Common Units Noncontrolling Interests Dominion Energy Gas Holdings, LLC
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Beginning balance at Dec. 31, 2016 | $ 16,840 | $ 7,687 | $ 1,438 | $ 3,659 | $ (799) | $ (123) | $ 14,605 | $ 4,974 | $ 2,235 | $ 2,713 |  |  |  |
Net income including noncontrolling interests | 3,120 | 829 | 88 | 615 |  |  | 2,999 | 703 | 121 | 126 |  |  |  |
Sale of Dominion Energy Midstream common units—net of offering costs |  |  |  |  |  |  |  |  |  |  | $ 18 | $ 18 | $ 18 | $ 18
Dividends and distributions | (2,087) | (121) | (19) | (15) |  |  | (1,931) | (34) | (156) | (87) |  |  |  |
Distributions to noncontrolling interests |  |  | (193) |  |  |  |  | (193) |  | 193 |  |  |  |
Equity contributions from Dominion Energy |  | 51 | 44 |  |  |  |  | 44 |  | 7 |  |  |  |
Other comprehensive income (loss), net of tax |  | 26 |  |  |  | 25 |  | 25 |  | 1 |  |  |  |
Other | (5) | 5 | 3 | 2 |  |  | (5) | 5 |  |  |  |  |  |
Ending balance at Dec. 31, 2017 | 19,370 | 8,495 | 1,361 | 4,261 | (659) | (98) | 17,142 | 5,524 | 2,228 | 2,971 |  |  |  |
Cumulative-effect of changes in accounting principles | 6 | 3 |  | 29 | (1,023) | (26) | (121) | 3 | 127 |  |  |  |  |
Net income including noncontrolling interests | 2,549 | 656 | 180 | 301 |  |  | 2,447 | 481 | 102 | 175 |  |  |  |
Sale of Dominion Energy Midstream common units—net of offering costs | 4 |  |  |  |  |  |  |  | 4 |  |  | $ 4 |  | $ 4
Remeasurement of noncontrolling interest in Dominion Energy Midstream |  |  | 375 |  |  |  | 375 | 375 | (375) | (375) |  |  |  |
Dividends and distributions | (2,331) | (296) | (133) | (25) |  |  | (2,185) | (158) | (146) | (138) |  |  |  |
Distributions to noncontrolling interests |  |  | (27) |  |  |  |  | (27) |  | 27 |  |  |  |
Equity contributions from Dominion Energy |  | 48 | 48 |  |  |  |  | 48 |  |  |  |  |  |
Other comprehensive income (loss), net of tax |  | (45) |  |  |  | (45) |  | (45) |  |  |  |  |  |
Other | 16 |  |  |  |  |  | 16 |  |  |  |  |  |  |
Ending balance at Dec. 31, 2018 | 22,048 | 8,865 | 1,804 | 4,566 | (1,700) | (169) | 20,107 | 6,201 | 1,941 | 2,664 |  |  |  |
Net income including noncontrolling interests | 1,376 | 842 | 232 | 489 |  |  | 1,358 | 721 | 18 | 121 |  |  |  |
Acquisition of public interest in Dominion Energy Midstream | (40) | (40) | 1,181 |  |  |  | 1,181 | 1,181 | (1,221) | (1,221) |  |  |  |
Dividends and distributions |  | (636) | (457) |  |  |  |  | (457) |  | (179) |  |  |  |
Equity contributions from Dominion Energy |  | 3,385 | 3,385 |  |  |  |  | 3,385 |  |  |  |  |  |
Dominion Energy Gas Restructuring |  | (2,168) | $ (6,145) | 3,978 |  | (1) |  | (2,168) |  |  |  |  |  |
Other comprehensive income (loss), net of tax |  | (18) |  |  |  | (17) |  | (17) |  | (1) |  |  |  |
Other | 14 | (1) |  | (2) |  |  | 14 | (2) |  | 1 |  |  |  |
Ending balance at Dec. 31, 2019 | $ 34,033 | $ 10,229 |  | $ 9,031 | $ (1,793) | $ (187) | $ 31,994 | $ 8,844 | $ 2,039 | $ 1,385 |  |  |  |

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