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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Net income including noncontrolling interests $ 883 $ 696 $ 1,887 $ 1,787
Net income 854 665 1,806 1,687
Other comprehensive income (loss), net of taxes:        
Net deferred gains (losses) on derivatives-hedging activities [1] (27) 11 51 82
Changes in unrealized net gains (losses) on investment securities [2] (6) 48 (24) 141
Amounts reclassified to net income:        
Net derivative (gains) losses-hedging activities [3] 30 (15) 71 (56)
Net realized (gains) losses on investment securities [4] 3 (4) 4 (36)
Net pension and other postretirement benefit costs [5] 18 14 60 38
Changes in other comprehensive income from equity method investees [6]     1 2
Total other comprehensive income (loss) 18 54 163 171
Comprehensive income including noncontrolling interests 901 750 2,050 1,958
Comprehensive income attributable to noncontrolling interests 29 31 82 100
Comprehensive income 872 719 1,968 1,858
Virginia Electric and Power Company        
Net income 520 459 1,043 1,133
Other comprehensive income (loss), net of taxes:        
Net deferred gains (losses) on derivatives-hedging activities [7] 3 (2) 10 (5)
Changes in unrealized net gains (losses) on investment securities [8]   6 (2) 17
Amounts reclassified to net income:        
Net derivative (gains) losses-hedging activities [9]       1
Net realized (gains) losses on nuclear decommissioning trust funds [10]       (4)
Total other comprehensive income (loss) 3 4 8 9
Comprehensive income 523 463 1,051 1,142
Dominion Energy Gas Holdings, LLC        
Net income 136 117 317 302
Other comprehensive income (loss), net of taxes:        
Net deferred gains (losses) on derivatives-hedging activities [11] 3 1 (4) 3
Amounts reclassified to net income:        
Net derivative (gains) losses-hedging activities [12] 5 (4) 16 (5)
Net pension and other postretirement benefit costs [13] 2 1 4 3
Total other comprehensive income (loss) 10 (2) 16 1
Comprehensive income $ 146 $ 115 $ 333 $ 303
[1] Net of $9 million and $(5) million tax for the three months ended September 30, 2018 and 2017, respectively, and net of $(17) million and $(49) million tax for the nine months ended September 30, 2018 and 2017, respectively.
[2] Net of $1 million and $(27) million tax for the three months ended September 30, 2018 and 2017, respectively, and net of $7 million and $(80) million tax for the nine months ended September 30, 2018 and 2017, respectively.
[3] Net of $(10) million and $10 million tax for the three months ended September 30, 2018 and 2017, respectively, and net of $(24) million and $35 million tax for the nine months ended September 30, 2018 and 2017, respectively.
[4] Net of $— million and $2 million tax for the three months ended September 30, 2018 and 2017, respectively, and net of $(1) million and $20 million tax for the nine months ended September 30, 2018 and 2017, respectively.
[5] Net of $(7) million tax for both the three months ended September 30, 2018 and 2017, and net of $(15) million and $(25) million tax for the nine months ended September 30, 2018 and 2017, respectively.
[6] Net of $— million tax for both the three months ended September 30, 2018 and 2017, and net of $(1) million tax for both the nine months ended September 30, 2018 and 2017.
[7] Net of $(1) million and $1 million tax for the three months ended September 30, 2018 and 2017, respectively, and net of $(3) million and $3 million tax for the nine months ended September 30, 2018 and 2017, respectively.
[8] Net of $— million and $(4) million tax for the three months ended September 30, 2018 and 2017, respectively, and net of $1 million and $(11) million tax for the nine months ended September 30, 2018 and 2017, respectively.
[9] Net of $— million tax for both the three and nine months ended September 30, 2018 and 2017.
[10] Net of $— million tax for both the three months ended September 30, 2018 and 2017, and net of $— million and $2 million tax for the nine months ended September 30, 2018 and 2017, respectively.
[11] Net of $(1) million tax for both the three months ended September 30, 2018 and 2017, and net of $2 million and $(2) million tax for the nine months ended September 30, 2018 and 2017, respectively.
[12] Net of $(2) million and $3 million tax for the three months ended September 30, 2018 and 2017, respectively, and net of $(6) million and $3 million tax for the nine months ended September 30, 2018 and 2017, respectively.
[13] Net of $— million and $(1) million tax for the three months ended September 30, 2018 and 2017, respectively, and net of $(1) million and $(2) million tax for the nine months ended September 30, 2018 and 2017, respectively.