Long-Term Debt (Based on Stated Maturity Dates Rather than Early Redemption Dates that Could be Elected by Instrument Holders) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Debt Instrument [Line Items]
2014	$ 1,505
2015	960
2016	1,771
2017	1,378
2018	1,350
Thereafter	13,878
Total	20,842
Virginia Electric and Power Company
Debt Instrument [Line Items]
2014	58
2015	211
2016	476
2017	679
2018	850
Thereafter	5,769
Total	8,043
2014
Debt Instrument [Line Items]
Weighted-average Coupon	2.95%
2014 \| Virginia Electric and Power Company
Debt Instrument [Line Items]
Weighted-average Coupon	4.10%
2015
Debt Instrument [Line Items]
Weighted-average Coupon	4.45%
2015 \| Virginia Electric and Power Company
Debt Instrument [Line Items]
Weighted-average Coupon	5.39%
2016
Debt Instrument [Line Items]
Weighted-average Coupon	3.51%
2016 \| Virginia Electric and Power Company
Debt Instrument [Line Items]
Weighted-average Coupon	5.25%
2017
Debt Instrument [Line Items]
Weighted-average Coupon	4.55%
2017 \| Virginia Electric and Power Company
Debt Instrument [Line Items]
Weighted-average Coupon	5.44%
2018
Debt Instrument [Line Items]
Weighted-average Coupon	4.99%
2018 \| Virginia Electric and Power Company
Debt Instrument [Line Items]
Weighted-average Coupon	4.17%
Thereafter
Debt Instrument [Line Items]
Weighted-average Coupon	4.90%
Thereafter \| Virginia Electric and Power Company
Debt Instrument [Line Items]
Weighted-average Coupon	4.78%
Unsecured Senior Notes
Debt Instrument [Line Items]
2014	1,465
2015	960
2016	1,752
2017	1,303
2018	1,350
Thereafter	10,523
Total	17,353
Tax-Exempt Financings
Debt Instrument [Line Items]
2014	40
2015	0
2016	19
2017	75
2018	0
Thereafter	880
Total	1,014
Unsecured Junior Subordinated Notes Payable to Affiliated Trusts
Debt Instrument [Line Items]
2014	0
2015	0
2016	0
2017	0
2018	0
Thereafter	10
Total	10
Enhanced Junior Subordinated Notes
Debt Instrument [Line Items]
2014	0
2015	0
2016	0
2017	0
2018	0
Thereafter	1,365
Total	1,365
Remarketable Subordinated Notes
Debt Instrument [Line Items]
2014	0
2015	0
2016	0
2017	0
2018	0
Thereafter	1,100
Total	$ 1,100

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20, 22

-Article 5

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year.

+ References

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