Property, Plant and Equipment (Property, Plant and Equipment) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Utility:
Generation	$ 14,018		$ 13,707
Transmission	8,686		7,799
Distribution	11,714		11,071
Storage	2,190		2,137
Nuclear fuel	1,375		1,277
Gas gathering and processing	787		803
General and other	812		803
Other-including plant under construction	3,261		2,232
Total utility	42,843		39,829
Nonutility:
Merchant generation-nuclear	1,153		1,163
Merchant generation-other	1,328	[1]	1,289	[1]
Nuclear fuel	770		775
Other-including plant under construction	875		1,265
Total nonutility	4,126		4,492
Total property, plant and equipment	46,969		44,321
Merchant generation other, due to consolidation of VIE			957
Virginia Electric and Power Company
Utility:
Generation	14,018		13,707
Transmission	4,959		4,261
Distribution	9,103		8,701
Nuclear fuel	1,375		1,277
General and other	668		659
Other-including plant under construction	2,719		2,017
Total utility	32,842		30,622
Nonutility:
Total nonutility	6		9
Total property, plant and equipment	$ 32,848		$ 30,631

[1] 2012 amount includes $957 million due to consolidation of a VIE. See Note 15 for further information.