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Significant Financing Transactions (Tables) | 3 Months Ended
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Mar. 31, 2017
Debt Instrument [Line Items] |
Schedule of Line of Credit Facilities | At March 31, 2017, Dominion’s commercial paper and letters of credit outstanding, as well as its capacity available under credit facilities, were as follows:
| Facility Limit | Outstanding Commercial Paper | Outstanding Letters of Credit | Facility Capacity Available
(millions) |  |  |  |
Joint revolving credit facility(1) | $ | 5,000 |  | $ | 2,627 |  | $ | — |  | $ | 2,373 |
Joint revolving credit facility(1) | 500 |  | — |  | 76 |  | 424 |
Total | $ | 5,500 |  | $ | 2,627 |  | $ | 76 |  | $ | 2,797 |
(1) | These credit facilities mature in April 2020 and can be used by the Companies to support bank borrowings and the issuance of commercial paper, as well as to support up to a combined $2.0 billion of letters of credit.
Virginia Electric and Power Company |
Debt Instrument [Line Items] |
Schedule of Line of Credit Facilities | At March 31, 2017, Virginia Power’s share of commercial paper and letters of credit outstanding under its joint credit facilities with Dominion, Dominion Gas and Questar Gas were as follows:
| Facility Limit(1) | Outstanding Commercial Paper | Outstanding Letters of Credit
(millions) |  |  |
Joint revolving credit facility(1) | $ | 5,000 |  | $ | 40 |  | $ | — |
Joint revolving credit facility(1) | 500 |  | — |  | 1 |
Total | $ | 5,500 |  | $ | 40 |  | $ | 1 |
(1) | The full amount of the facilities is available to Virginia Power, less any amounts outstanding to co-borrowers Dominion, Dominion Gas and Questar Gas. Sub-limits for Virginia Power are set within the facility limit but can be changed at the option of the Companies multiple times per year. At March 31, 2017, the aggregate sub-limit for Virginia Power was $2.0 billion. If Virginia Power has liquidity needs in excess of its sub-limit, the sub-limit may be changed or such needs may be satisfied through short-term intercompany borrowings from Dominion. These credit facilities mature in April 2020 and can be used to support bank borrowings and the issuance of commercial paper, as well as to support up to $2.0 billion (or the sub-limit, whichever is less) of letters of credit.
Dominion Gas Holdings, LLC |
Debt Instrument [Line Items] |
Schedule of Line of Credit Facilities | At March 31, 2017, Dominion Gas' share of commercial paper and letters of credit outstanding under its joint credit facilities with Dominion, Virginia Power and Questar Gas were as follows:
| Facility Limit(1) | Outstanding Commercial Paper | Outstanding Letters of Credit
(millions) |  |  |
Joint revolving credit facility(1) | $ | 1,000 |  | $ | 399 |  | $ | — |
Joint revolving credit facility(1) | 500 |  | — |  | — |
Total | $ | 1,500 |  | $ | 399 |  | $ | — |
(1) | A maximum of a combined $1.5 billion of the facilities is available to Dominion Gas, assuming adequate capacity is available after giving effect to uses by co-borrowers Dominion, Virginia Power and Questar Gas. Sub-limits for Dominion Gas are set within the facility limit but can be changed at the option of the Companies multiple times per year. At March 31, 2017, the aggregate sub-limit for Dominion Gas was $500 million. If Dominion Gas has liquidity needs in excess of its sub-limit, the sub-limit may be changed or such needs may be satisfied through short-term intercompany borrowings from Dominion. These credit facilities mature in April 2020 and can be used to support bank borrowings and the issuance of commercial paper, as well as to support up to $1.5 billion (or the sub-limit, whichever is less) of letters of credit.

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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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