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Fair Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2018
Fair Value Inputs, Assets, Quantitative Information | The following table presents Dominion Energy’s quantitative information about Level 3 fair value measurements at June 30, 2018. The range and weighted average are presented in dollars for market price inputs and percentages for price volatility.
|  | Fair Value (millions) |  |  | Valuation Techniques |  | Unobservable Input |  |  | Range |  | Weighted Average(1) |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Physical and financial forwards and futures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Natural gas(2) |  | $ | 90 |  |  | Discounted cash flow |  | Market price (per Dth) | (3) |  | (1) - 6 |  |  | — |
FTRs |  |  | 7 |  |  | Discounted cash flow |  | Market price (per MWh) | (3) |  | (1) - 6 |  |  | — |
Physical options: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Natural gas |  |  | 1 |  |  | Option model |  | Market price (per Dth) | (3) |  | 2 - 6 |  |  | 3 |
|  |  |  |  |  |  |  | Price volatility | (4) |  | 13% - 35% |  |  | 23 | %
Electricity |  |  | 24 |  |  | Option model |  | Market price (per MWh) | (3) |  | 24 - 51 |  |  | 37 |
|  |  |  |  |  |  |  | Price volatility | (4) |  | 4% - 62% |  |  | 29 | %
Total assets |  | $ | 122 |  |  |  |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial forwards: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FTRs |  | $ | 3 |  |  | Discounted cash flow |  | Market price (per MWh) | (3) |  | (1) - 6 |  |  | 1 |
Total liabilities |  | $ | 3 |  |  |  |  |  |  |  |  |  |  |  |
(1) | Averages weighted by volume.
(2) | Includes basis.
(3) | Represents market prices beyond defined terms for Levels 1 and 2.
(4) | Represents volatilities unrepresented in published markets.
Fair Value, Option, Qualitative Disclosures | Sensitivity of the fair value measurements to changes in the significant unobservable inputs is as follows:
Significant Unobservable Inputs |  | Position |  | Change to Input |  | Impact on Fair Value Measurement
Market price |  | Buy |  | Increase (decrease) |  | Gain (loss)
Market price |  | Sell |  | Increase (decrease) |  | Loss (gain)
Price volatility |  | Buy |  | Increase (decrease) |  | Gain (loss)
Price volatility |  | Sell |  | Increase (decrease) |  | Loss (gain)
Fair Value, by Balance Sheet Grouping | The following table presents Dominion Energy’s assets and liabilities that are measured at fair value on a recurring basis for each hierarchy level, including both current and noncurrent portions:
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
(millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At June 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity |  | $ | — |  |  | $ | 37 |  |  | $ | 122 |  |  | $ | 159 |
Interest rate |  |  | — |  |  |  | 58 |  |  |  | — |  |  |  | 58 |
Foreign currency |  |  | — |  |  |  | 33 |  |  |  | — |  |  |  | 33 |
Investments(1): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. |  |  | 3,529 |  |  |  | — |  |  |  | — |  |  |  | 3,529 |
Fixed income securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt instruments |  |  | — |  |  |  | 445 |  |  |  | — |  |  |  | 445 |
Government securities |  |  | 270 |  |  |  | 837 |  |  |  | — |  |  |  | 1,107 |
Cash equivalents and other |  |  | 14 |  |  |  | — |  |  |  | — |  |  |  | 14 |
Total assets |  | $ | 3,813 |  |  | $ | 1,410 |  |  | $ | 122 |  |  | $ | 5,345 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity |  | $ | — |  |  | $ | 52 |  |  | $ | 3 |  |  | $ | 55 |
Interest rate |  |  | — |  |  |  | 58 |  |  |  | — |  |  |  | 58 |
Foreign currency |  |  | — |  |  |  | 5 |  |  |  | — |  |  |  | 5 |
Total liabilities |  | $ | — |  |  | $ | 115 |  |  | $ | 3 |  |  | $ | 118 |
At December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity |  | $ | — |  |  | $ | 101 |  |  | $ | 157 |  |  | $ | 258 |
Interest rate |  |  | — |  |  |  | 17 |  |  |  | — |  |  |  | 17 |
Foreign currency |  |  | — |  |  |  | 32 |  |  |  | — |  |  |  | 32 |
Investments(1): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. |  |  | 3,493 |  |  |  | — |  |  |  | — |  |  |  | 3,493 |
Fixed income securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt instruments |  |  | — |  |  |  | 444 |  |  |  | — |  |  |  | 444 |
Government securities |  |  | 307 |  |  |  | 794 |  |  |  | — |  |  |  | 1,101 |
Cash equivalents and other |  |  | 34 |  |  |  | — |  |  |  | — |  |  |  | 34 |
Total assets |  | $ | 3,834 |  |  | $ | 1,388 |  |  | $ | 157 |  |  | $ | 5,379 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity |  | $ | — |  |  | $ | 190 |  |  | $ | 7 |  |  | $ | 197 |
Interest rate |  |  | — |  |  |  | 85 |  |  |  | — |  |  |  | 85 |
Foreign currency |  |  | — |  |  |  | 2 |  |  |  | — |  |  |  | 2 |
Total liabilities |  | $ | — |  |  | $ | 277 |  |  | $ | 7 |  |  | $ | 284 |
(1) | Includes investments held in the nuclear decommissioning and rabbi trusts. Excludes $211 million and $88 million of assets at June 30, 2018 and December 31, 2017, respectively, measured at fair value using NAV (or its equivalent) as a practical expedient which are not required to be categorized in the fair value hierarchy.
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation | The following table presents the net change in Dominion Energy's assets and liabilities measured at fair value on a recurring basis and included in the Level 3 fair value category:
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
(millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 120 |  |  | $ | 130 |  |  | $ | 150 |  |  | $ | 139 |
Total realized and unrealized gains (losses): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Included in earnings |  |  | (2 | ) |  |  | (10 | ) |  |  | (20 | ) |  |  | (25 | )
Included in other comprehensive income |  |  | — |  |  |  | — |  |  |  | 1 |  |  |  | — |
Included in regulatory assets/liabilities |  |  | 11 |  |  |  | 32 |  |  |  | (10 | ) |  |  | 23 |
Settlements |  |  | (10 | ) |  |  | — |  |  |  | (3 | ) |  |  | 12 |
Transfers out of Level 3 |  |  | — |  |  |  | — |  |  |  | 1 |  |  |  | 3 |
Ending balance |  | $ | 119 |  |  | $ | 152 |  |  | $ | 119 |  |  | $ | 152 |
Fair Value Unobservable Inputs Gain (Loss) Included In Earnings | The following table presents Dominion Energy’s classification of gains and losses included in earnings in the Level 3 fair value category.
|  | Operating Revenue |  |  | Electric Fuel and Other Energy-Related Purchases |  |  | Total |
(millions) |  |  |  |  |  |  |  |  |  |  |  |
Three Months Ended June 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Total gains (losses) included in earnings |  | $ | — |  |  | $ | (2 | ) |  | $ | (2 | )
Three Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Total gains (losses) included in earnings |  | $ | — |  |  | $ | (10 | ) |  | $ | (10 | )
Six Months Ended June 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Total gains (losses) included in earnings |  | $ | (1 | ) |  | $ | (19 | ) |  | $ | (20 | )
Six Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Total gains (losses) included in earnings |  | $ | — |  |  | $ | (25 | ) |  | $ | (25 | )
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments | For the Companies' financial instruments that are not recorded at fair value, the carrying amounts and estimated fair values are as follows:
|  | June 30, 2018 |  |  | December 31, 2017 |
|  | Carrying Amount |  |  | Estimated Fair Value(1) |  |  | Carrying Amount |  |  | Estimated Fair Value(1) |
(millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, including securities due within one year(2) |  | $ | 29,629 |  |  | $ | 30,779 |  |  | $ | 28,666 |  |  | $ | 31,233 |
Junior subordinated notes(3) |  |  | 3,981 |  |  |  | 4,016 |  |  |  | 3,981 |  |  |  | 4,102 |
Remarketable subordinated notes(3) |  |  | 1,382 |  |  |  | 1,294 |  |  |  | 1,379 |  |  |  | 1,446 |
Credit facility borrowings |  |  | 73 |  |  |  | 73 |  |  |  | — |  |  |  | — |
Virginia Power |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, including securities due within one year(3) |  | $ | 11,091 |  |  | $ | 11,799 |  |  | $ | 11,346 |  |  | $ | 12,842 |
Dominion Energy Gas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, including securities due within one year(4) |  | $ | 4,062 |  |  | $ | 4,094 |  |  | $ | 3,570 |  |  | $ | 3,719 |
(1) | Fair value is estimated using market prices, where available, and interest rates currently available for issuance of debt with similar terms and remaining maturities. All fair value measurements are classified as Level 2. The carrying amount of debt issues with short-term maturities and variable rates refinanced at current market rates is a reasonable estimate of their fair value.
(2) | Carrying amount includes amounts which represent the unamortized debt issuance costs, discount or premium, and foreign currency remeasurement adjustments. At June 30, 2018 and December 31, 2017, includes the valuation of certain fair value hedges associated with fixed rate debt of $(61) million and $(22) million, respectively.
(3) | Carrying amount includes amounts which represent the unamortized debt issuance costs, discount or premium.
(4) | Carrying amount includes amounts which represent the unamortized debt issuance costs, discount or premium, and foreign currency remeasurement adjustments.
Virginia Electric and Power Company |
Fair Value Inputs, Assets, Quantitative Information | The following table presents Virginia Power’s quantitative information about Level 3 fair value measurements at June 30, 2018. The range and weighted average are presented in dollars for market price inputs and percentages for price volatility.
|  | Fair Value (millions) |  |  | Valuation Techniques |  | Unobservable Input |  |  | Range |  | Weighted Average(1) |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Physical and financial forwards and futures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Natural gas(2) |  | $ | 86 |  |  | Discounted cash flow |  | Market price (per Dth) | (3) |  | (1) - 6 |  |  | (1 | )
FTRs |  |  | 7 |  |  | Discounted cash flow |  | Market price (per MWh) | (3) |  | (1) - 6 |  |  | — |
Physical options: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Natural gas |  |  | 1 |  |  | Option model |  | Market price (per Dth) | (3) |  | 2 - 6 |  |  | 3 |
|  |  |  |  |  |  |  | Price volatility | (4) |  | 13% - 35% |  |  | 23 | %
Electricity |  |  | 24 |  |  | Option model |  | Market price (per MWh) | (3) |  | 24 - 51 |  |  | 37 |
|  |  |  |  |  |  |  | Price volatility | (4) |  | 4% - 62% |  |  | 29 | %
Total assets |  | $ | 118 |  |  |  |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial forwards: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FTRs |  | $ | 3 |  |  | Discounted cash flow |  | Market price (per MWh) | (3) |  | (1) - 6 |  |  | 1 |
Total liabilities |  | $ | 3 |  |  |  |  |  |  |  |  |  |  |  |
(1) | Averages weighted by volume.
(2) | Includes basis.
(3) | Represents market prices beyond defined terms for Levels 1 and 2.
(4) | Represents volatilities unrepresented in published markets.
Fair Value, Option, Qualitative Disclosures | Sensitivity of the fair value measurements to changes in the significant unobservable inputs is as follows:
Significant Unobservable Inputs |  | Position |  | Change to Input |  | Impact on Fair Value Measurement
Market price |  | Buy |  | Increase (decrease) |  | Gain (loss)
Market price |  | Sell |  | Increase (decrease) |  | Loss (gain)
Price volatility |  | Buy |  | Increase (decrease) |  | Gain (loss)
Price volatility |  | Sell |  | Increase (decrease) |  | Loss (gain)
Fair Value, by Balance Sheet Grouping | The following table presents Virginia Power’s assets and liabilities that are measured at fair value on a recurring basis for each hierarchy level, including both current and noncurrent portions:
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
(millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At June 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity |  | $ | — |  |  | $ | 8 |  |  | $ | 118 |  |  | $ | 126 |
Interest rate |  |  | — |  |  |  | 21 |  |  |  | — |  |  |  | 21 |
Investments(1): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. |  |  | 1,584 |  |  |  | — |  |  |  | — |  |  |  | 1,584 |
Fixed income securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt instruments |  |  | — |  |  |  | 227 |  |  |  | — |  |  |  | 227 |
Government securities |  |  | 164 |  |  |  | 328 |  |  |  | — |  |  |  | 492 |
Cash equivalents and other |  |  | 3 |  |  |  | — |  |  |  | — |  |  |  | 3 |
Total assets |  | $ | 1,751 |  |  | $ | 584 |  |  | $ | 118 |  |  | $ | 2,453 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity |  | $ | — |  |  | $ | 5 |  |  | $ | 3 |  |  | $ | 8 |
Interest rate |  |  | — |  |  |  | 6 |  |  |  | — |  |  |  | 6 |
Total liabilities |  | $ | — |  |  | $ | 11 |  |  | $ | 3 |  |  | $ | 14 |
At December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity |  | $ | — |  |  | $ | 14 |  |  | $ | 152 |  |  | $ | 166 |
Investments(1): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. |  |  | 1,566 |  |  |  | — |  |  |  | — |  |  |  | 1,566 |
Fixed income securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt instruments |  |  | — |  |  |  | 224 |  |  |  | — |  |  |  | 224 |
Government securities |  |  | 168 |  |  |  | 326 |  |  |  | — |  |  |  | 494 |
Cash equivalents and other |  |  | 16 |  |  |  | — |  |  |  | — |  |  |  | 16 |
Total assets |  | $ | 1,750 |  |  | $ | 564 |  |  | $ | 152 |  |  | $ | 2,466 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity |  | $ | — |  |  | $ | 4 |  |  | $ | 5 |  |  | $ | 9 |
Interest rate |  |  | — |  |  |  | 57 |  |  |  | — |  |  |  | 57 |
Total liabilities |  | $ | — |  |  | $ | 61 |  |  | $ | 5 |  |  | $ | 66 |
(1) | Includes investments held in the nuclear decommissioning trusts. Excludes $171 million and $27 million of assets at June 30, 2018 and December 31, 2017, respectively, measured at fair value using NAV (or its equivalent) as a practical expedient which are not required to be categorized in the fair value hierarchy.
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation | The following table presents the net change in Virginia Power’s assets and liabilities measured at fair value on a recurring basis and included in the Level 3 fair value category:
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
(millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 117 |  |  | $ | 132 |  |  | $ | 147 |  |  | $ | 143 |
Total realized and unrealized gains (losses): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Included in earnings |  |  | (2 | ) |  |  | (10 | ) |  |  | (19 | ) |  |  | (25 | )
Included in regulatory assets/liabilities |  |  | 8 |  |  |  | 31 |  |  |  | (11 | ) |  |  | 23 |
Settlements |  |  | (8 | ) |  |  | (1 | ) |  |  | (2 | ) |  |  | 11 |
Ending balance |  | $ | 115 |  |  | $ | 152 |  |  | $ | 115 |  |  | $ | 152 |
Dominion Energy Gas Holdings, LLC |
Fair Value, by Balance Sheet Grouping | The following table presents Dominion Energy Gas’ assets and liabilities for derivatives that are measured at fair value on a recurring basis for each hierarchy level, including both current and noncurrent portions.
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
(millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At June 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  | $ | — |  |  | $ | 1 |  |  | $ | — |  |  | $ | 1 |
Foreign currency |  |  | — |  |  |  | 33 |  |  |  | — |  |  |  | 33 |
Total assets |  | $ | — |  |  | $ | 34 |  |  | $ | — |  |  | $ | 34 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity |  | $ | — |  |  | $ | 7 |  |  | $ | — |  |  | $ | 7 |
Interest rate |  |  | — |  |  |  | 4 |  |  |  | — |  |  |  | 4 |
Foreign currency |  |  | — |  |  |  | 5 |  |  |  | — |  |  |  | 5 |
Total liabilities |  | $ | — |  |  | $ | 16 |  |  | $ | — |  |  | $ | 16 |
At December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency |  | $ | — |  |  | $ | 32 |  |  | $ | — |  |  | $ | 32 |
Total assets |  | $ | — |  |  | $ | 32 |  |  | $ | — |  |  | $ | 32 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity |  | $ | — |  |  | $ | 4 |  |  | $ | 2 |  |  | $ | 6 |
Foreign currency |  |  | — |  |  |  | 2 |  |  |  | — |  |  |  | 2 |
Total liabilities |  | $ | — |  |  | $ | 6 |  |  | $ | 2 |  |  | $ | 8 |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation | The following table presents the net change in Dominion Energy Gas’ assets and liabilities for derivatives measured at fair value on a recurring basis and included in the Level 3 fair value category. There were no net changes in assets and liabilities measured at fair value on a recurring basis and included in the Level 3 fair value category for the three months ended June 30, 2018 and 2017.
|  | Six Months Ended |
|  | June 30, |
|  | 2018 |  |  | 2017 |
(millions) |  |  |  |  |  |  |  |
Beginning balance |  | $ | (2 | ) |  | $ | (2 | )
Total realized and unrealized gains (losses): |  |  |  |  |  |  |  |
Included in other comprehensive income (loss) |  |  | 1 |  |  |  | (1 | )
Transfers out of Level 3 |  |  | 1 |  |  |  | 3 |
Ending balance |  | $ | — |  |  | $ | — |

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- Definition Fair value measurements to changes in unobservable input sensitivity. + References No definition available. + Details
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- Definition This element contains information about the entity's gains and losses included in earnings in the Level 3 fair value category.. + References No definition available. + Details
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