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, 2011	Dec. 31, 2010
Total	$ 18,745	$ 16,229
Dominion [Member]
Secured Senior Note	1,001
Senior Notes	14,677
Tax exempt financings	1,346
Unsecured Junior Subordinated Notes Payable to Affiliated Trusts	268
Enhanced Junior Subordinated Notes	1,453
Total	18,745
2012 [Member] | Dominion [Member]
Secured Senior Note	13
Senior Notes	1,470
Tax exempt financings	0
Unsecured Junior Subordinated Notes Payable to Affiliated Trusts	0
Enhanced Junior Subordinated Notes	0
Total	1,483
Weighted-average coupon	5.62%
2013 [Member] | Dominion [Member]
Secured Senior Note	853
Senior Notes	690
Tax exempt financings	0
Unsecured Junior Subordinated Notes Payable to Affiliated Trusts	0
Enhanced Junior Subordinated Notes	0
Total	1,543
Weighted-average coupon	5.04%
2014 [Member] | Dominion [Member]
Secured Senior Note	15
Senior Notes	1,065
Tax exempt financings	0
Unsecured Junior Subordinated Notes Payable to Affiliated Trusts	0
Enhanced Junior Subordinated Notes	0
Total	1,080
Weighted-average coupon	3.99%
2015 [Member] | Dominion [Member]
Secured Senior Note	18
Senior Notes	960
Tax exempt financings	8
Unsecured Junior Subordinated Notes Payable to Affiliated Trusts	0
Enhanced Junior Subordinated Notes	0
Total	986
Weighted-average coupon	4.52%
2016 [Member] | Dominion [Member]
Secured Senior Note	20
Senior Notes	1,351
Tax exempt financings	27
Unsecured Junior Subordinated Notes Payable to Affiliated Trusts	0
Enhanced Junior Subordinated Notes	0
Total	1,398
Weighted-average coupon	4.29%
Thereafter [Member] | Dominion [Member]
Secured Senior Note	82
Senior Notes	9,141
Tax exempt financings	1,311
Unsecured Junior Subordinated Notes Payable to Affiliated Trusts	268
Enhanced Junior Subordinated Notes	1,453
Total	$ 12,255
Weighted-average coupon	5.79%