Asset Retirement Obligations (Changes to AROs) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
AROs, Beginning balance	$ 1,705	[1]	$ 1,398	[1]
Obligations incurred during the period	13		24
Obligations settled during the period	(68)		(13)
Revisions in estimated cash flows	(129)	[2]	242	[3]
Accretion	(86)		(77)
Other	(29)		(23)
AROs , Ending balance	1,578	[1]	1,705	[1]
Other current liabilities	94		64		15
Virginia Electric and Power Company
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
AROs, Beginning balance	705		625	[4]
Obligations incurred during the period	2		18
Obligations settled during the period	(2)		(1)
Revisions in estimated cash flows	(52)	[2]	41	[5]
Accretion	(38)		(34)
Other	(2)		(12)
AROs , Ending balance	689		705
Asset retirement obligation			$ 1

[1] Includes $15 million, $64 million and $94 million reported in other current liabilities at December 31, 2011, 2012, and 2013, respectively.

[2] Primarily reflects lower anticipated nuclear decommissioning costs.

[3] Primarily reflects the accelerated timing of the decommissioning of Kewaunee that began in 2013.

[4] Includes $1 million reported in other current liabilities.

[5] Primarily reflects the effect of higher anticipated nuclear decommissioning costs.