Fair Value Measurements (Financial Instruments' Carrying Amounts and Fair Values) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010
Long-term debt - VIEs	$ 890		$ 0
Junior subordinated notes payable to affiliates	268		268
Enhanced junior subordinated notes	1,451		1,467
Subsidiary preferred stock	257		257
Valuation of certain fair value hedges	105		49
Payments of Stock Issuance Costs	2		2
Carrying Amount [Member]
Long-term debt, including securities due within one year	16,264	[1]	14,520	[1]
Long-term debt - VIEs	890	[2]	0	[2]
Junior subordinated notes payable to affiliates	268		268
Enhanced junior subordinated notes	1,451		1,467
Subsidiary preferred stock	257	[3]	257	[3]
Estimated Fair Value [Member]
Long-term debt, including securities due within one year	18,936	[1],[4]	16,112	[1],[4]
Long-term debt - VIEs	892	[2]	0	[2]
Junior subordinated notes payable to affiliates	268	[4]	261	[4]
Enhanced junior subordinated notes	1,518	[4]	1,560	[4]
Subsidiary preferred stock	$ 256	[3],[4]	$ 249	[3],[4]

[1] Includes amounts which represent the unamortized discount and premium. At December 31, 2011, and 2010, includes the valuation of certain fair value hedges associated with Dominion's fixed rate debt, of approximately $105 million and $49 million, respectively.

[2] Includes amounts which represent the unamortized premium.

[3] Includes issuance expenses of $2 million at December 31, 2011 and 2010.

[4] Fair value is estimated using market prices, where available, and interest rates currently available for issuance of debt with similar terms and remaining maturities. 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.