Derivatives and Hedge Accounting Activities (Fair Value of Derivatives) (Details) (USD $) In Millions	Sep. 30, 2011		Dec. 31, 2010
Total Fair Value, Assets	$ 867		$ 897
Total Fair Value, Liabilities	1,120		830
Interest Rate Contract [Member] | Fair Value - Derivatives under Hedge Accounting [Member] | Current Assets [Member]
Total Fair Value, Assets	36		23
Interest Rate Contract [Member] | Fair Value - Derivatives under Hedge Accounting [Member] | Noncurrent Assets [Member]
Total Fair Value, Assets	67		31
Interest Rate Contract [Member] | Fair Value - Derivatives under Hedge Accounting [Member] | Current Liabilities [Member]
Total Fair Value, Liabilities	124
Interest Rate Contract [Member] | Fair Value - Derivatives under Hedge Accounting [Member] | Noncurrent Liabilities [Member]
Total Fair Value, Liabilities	74		5
Commodity Contract [Member] | Fair Value - Derivatives under Hedge Accounting [Member] | Current Assets [Member]
Total Fair Value, Assets	150		291
Commodity Contract [Member] | Fair Value - Derivatives under Hedge Accounting [Member] | Noncurrent Assets [Member]
Total Fair Value, Assets	105		44
Commodity Contract [Member] | Fair Value - Derivatives under Hedge Accounting [Member] | Current Liabilities [Member]
Total Fair Value, Liabilities	186		178
Commodity Contract [Member] | Fair Value - Derivatives under Hedge Accounting [Member] | Noncurrent Liabilities [Member]
Total Fair Value, Liabilities	119		86
Fair Value - Derivatives under Hedge Accounting [Member]
Total Fair Value, Assets	358		389
Total Fair Value, Liabilities	503		269
Fair Value - Derivatives under Hedge Accounting [Member] | Current Assets [Member]
Total Fair Value, Assets	186		314
Fair Value - Derivatives under Hedge Accounting [Member] | Noncurrent Assets [Member]
Total Fair Value, Assets	172	[1]	75	[1]
Fair Value - Derivatives under Hedge Accounting [Member] | Current Liabilities [Member]
Total Fair Value, Liabilities	310	[2]	178	[2]
Fair Value - Derivatives under Hedge Accounting [Member] | Noncurrent Liabilities [Member]
Total Fair Value, Liabilities	193	[3]	91	[3]
Interest Rate Contract [Member] | Fair Value - Derivatives not under Hedge Accounting [Member] | Current Assets [Member]
Total Fair Value, Assets	0		0
Interest Rate Contract [Member] | Fair Value - Derivatives not under Hedge Accounting [Member] | Noncurrent Assets [Member]
Total Fair Value, Assets	0		0
Interest Rate Contract [Member] | Fair Value - Derivatives not under Hedge Accounting [Member] | Current Liabilities [Member]
Total Fair Value, Liabilities	7
Interest Rate Contract [Member] | Fair Value - Derivatives not under Hedge Accounting [Member] | Noncurrent Liabilities [Member]
Total Fair Value, Liabilities	31		0
Commodity Contract [Member] | Fair Value - Derivatives not under Hedge Accounting [Member] | Current Assets [Member]
Total Fair Value, Assets	412		425
Commodity Contract [Member] | Fair Value - Derivatives not under Hedge Accounting [Member] | Noncurrent Assets [Member]
Total Fair Value, Assets	97		83
Commodity Contract [Member] | Fair Value - Derivatives not under Hedge Accounting [Member] | Current Liabilities [Member]
Total Fair Value, Liabilities	476		455
Commodity Contract [Member] | Fair Value - Derivatives not under Hedge Accounting [Member] | Noncurrent Liabilities [Member]
Total Fair Value, Liabilities	103		106
Fair Value - Derivatives not under Hedge Accounting [Member]
Total Fair Value, Assets	509		508
Total Fair Value, Liabilities	617		561
Fair Value - Derivatives not under Hedge Accounting [Member] | Current Assets [Member]
Total Fair Value, Assets	412		425
Fair Value - Derivatives not under Hedge Accounting [Member] | Noncurrent Assets [Member]
Total Fair Value, Assets	97	[1]	83	[1]
Fair Value - Derivatives not under Hedge Accounting [Member] | Current Liabilities [Member]
Total Fair Value, Liabilities	483	[2]	455	[2]
Fair Value - Derivatives not under Hedge Accounting [Member] | Noncurrent Liabilities [Member]
Total Fair Value, Liabilities	134	[3]	106	[3]
Interest Rate Contract [Member] | Current Assets [Member]
Total Fair Value, Assets	36		23
Commodity Contract [Member] | Current Assets [Member]
Total Fair Value, Assets	562		716
Current Assets [Member]
Total Fair Value, Assets	598		739
Interest Rate Contract [Member] | Noncurrent Assets [Member]
Total Fair Value, Assets	67		31
Commodity Contract [Member] | Noncurrent Assets [Member]
Total Fair Value, Assets	202		127
Noncurrent Assets [Member]
Total Fair Value, Assets	269	[1]	158	[1]
Interest Rate Contract [Member] | Current Liabilities [Member]
Total Fair Value, Liabilities	131
Commodity Contract [Member] | Current Liabilities [Member]
Total Fair Value, Liabilities	662		633
Current Liabilities [Member]
Total Fair Value, Liabilities	793	[2]	633	[2]
Interest Rate Contract [Member] | Noncurrent Liabilities [Member]
Total Fair Value, Liabilities	105		5
Commodity Contract [Member] | Noncurrent Liabilities [Member]
Total Fair Value, Liabilities	222		192
Noncurrent Liabilities [Member]
Total Fair Value, Liabilities	$ 327	[3]	$ 197	[3]

[1] Noncurrent derivative assets are presented in other deferred charges and other assets in Dominion’s Consolidated Balance Sheets.

[2] Current derivative liabilities are presented in other current liabilities in Dominion's Consolidated Balance Sheets.

[3] Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in Dominion’s Consolidated Balance Sheets.