Operating Segments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Costs and Expenses	$ 2,577	$ 3,094
After Tax Net Benefits Expenses Attributable To Operating Segments	0
Operating Loss	(915)	(963)
Corporate and Other
Costs and Expenses	7	62
After Tax Net Benefits Expenses Attributable To Operating Segments		54
Dominion Generation
Impairment charges		55
Impairment charges, after-tax		39
Operating Loss		32
Operating Loss After Tax		$ 19