Accumulated Other Comprehensive Income (Schedule of Changes in AOCI by Component Net of Tax) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ (324)	[1]	$ (877)
Other comprehensive income before reclassifications: gains (losses)	(132)		(12)
Amounts reclassified from accumulated other comprehensive income (loss): (gains) losses	157	[2]	69	[2]
Total other comprehensive income	25		57
Ending balance	(299)		(820)
Deferred gains and losses on derivatives-hedging activities
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(288)		(122)
Other comprehensive income before reclassifications: gains (losses)	(150)		(90)
Amounts reclassified from accumulated other comprehensive income (loss): (gains) losses	160	[2]	76	[2]
Total other comprehensive income	10		(14)
Ending balance	(278)		(136)
Unrealized gains and losses on investment securities
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	474		326
Other comprehensive income before reclassifications: gains (losses)	29		78
Amounts reclassified from accumulated other comprehensive income (loss): (gains) losses	(11)	[2]	(27)	[2]
Total other comprehensive income	18		51
Ending balance	492		377
Unrecognized pension and other postretirement benefit costs
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(510)		(1,081)
Other comprehensive income before reclassifications: gains (losses)	(4)		0
Amounts reclassified from accumulated other comprehensive income (loss): (gains) losses	8	[2]	20	[2]
Total other comprehensive income	4		20
Ending balance	(506)		(1,061)
Other comprehensive income (loss) from equity method investee
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	0		0
Other comprehensive income before reclassifications: gains (losses)	(7)		0
Amounts reclassified from accumulated other comprehensive income (loss): (gains) losses	0	[2]	0	[2]
Total other comprehensive income	(7)		0
Ending balance	$ (7)		$ 0

[1] Dominion’s Consolidated Balance Sheet at December 31, 2013 has been derived from the audited Consolidated Financial Statements at that date.

[2] See table below for details about these reclassifications.