Derivatives and Hedge Accounting Activities (Fair Value of Derivatives) (Details) (USD $) In Millions	Jun. 30, 2011		Dec. 31, 2010
Total Fair Value, Assets	$ 673		$ 897
Total Fair Value, Liabilities	776		830
Fair Value - Derivatives under Hedge Accounting [Member]
Total Fair Value, Assets	330		389
Total Fair Value, Liabilities	352		269
Fair Value - Derivatives under Hedge Accounting [Member] | Current Assets [Member]
Total Fair Value, Assets	203		314
Fair Value - Derivatives under Hedge Accounting [Member] | Current Assets [Member] | Commodity Contract [Member]
Total Fair Value, Assets	163		291
Fair Value - Derivatives under Hedge Accounting [Member] | Current Assets [Member] | Interest Rate Contract [Member]
Total Fair Value, Assets	40		23
Fair Value - Derivatives under Hedge Accounting [Member] | Noncurrent Assets [Member]
Total Fair Value, Assets	127	[1]	75	[1]
Fair Value - Derivatives under Hedge Accounting [Member] | Noncurrent Assets [Member] | Commodity Contract [Member]
Total Fair Value, Assets	82		44
Fair Value - Derivatives under Hedge Accounting [Member] | Noncurrent Assets [Member] | Interest Rate Contract [Member]
Total Fair Value, Assets	45		31
Fair Value - Derivatives under Hedge Accounting [Member] | Current Liabilities [Member]
Total Fair Value, Liabilities	199	[2]	178	[2]
Fair Value - Derivatives under Hedge Accounting [Member] | Current Liabilities [Member] | Commodity Contract [Member]
Total Fair Value, Liabilities	172		178
Fair Value - Derivatives under Hedge Accounting [Member] | Current Liabilities [Member] | Interest Rate Contract [Member]
Total Fair Value, Liabilities	27
Fair Value - Derivatives under Hedge Accounting [Member] | Noncurrent Liabilities [Member]
Total Fair Value, Liabilities	153	[3]	91	[3]
Fair Value - Derivatives under Hedge Accounting [Member] | Noncurrent Liabilities [Member] | Commodity Contract [Member]
Total Fair Value, Liabilities	146		86
Fair Value - Derivatives under Hedge Accounting [Member] | Noncurrent Liabilities [Member] | Interest Rate Contract [Member]
Total Fair Value, Liabilities	7		5
Fair Value - Derivatives not under Hedge Accounting [Member]
Total Fair Value, Assets	343		508
Total Fair Value, Liabilities	424		561
Fair Value - Derivatives not under Hedge Accounting [Member] | Current Assets [Member]
Total Fair Value, Assets	273		425
Fair Value - Derivatives not under Hedge Accounting [Member] | Current Assets [Member] | Commodity Contract [Member]
Total Fair Value, Assets	273		425
Fair Value - Derivatives not under Hedge Accounting [Member] | Noncurrent Assets [Member]
Total Fair Value, Assets	70	[1]	83	[1]
Fair Value - Derivatives not under Hedge Accounting [Member] | Noncurrent Assets [Member] | Commodity Contract [Member]
Total Fair Value, Assets	70		83
Fair Value - Derivatives not under Hedge Accounting [Member] | Current Liabilities [Member]
Total Fair Value, Liabilities	344	[2]	455	[2]
Fair Value - Derivatives not under Hedge Accounting [Member] | Current Liabilities [Member] | Commodity Contract [Member]
Total Fair Value, Liabilities	344		455
Fair Value - Derivatives not under Hedge Accounting [Member] | Noncurrent Liabilities [Member]
Total Fair Value, Liabilities	80	[3]	106	[3]
Fair Value - Derivatives not under Hedge Accounting [Member] | Noncurrent Liabilities [Member] | Commodity Contract [Member]
Total Fair Value, Liabilities	80		106
Current Assets [Member]
Total Fair Value, Assets	476		739
Current Assets [Member] | Commodity Contract [Member]
Total Fair Value, Assets	436		716
Current Assets [Member] | Interest Rate Contract [Member]
Total Fair Value, Assets	40		23
Noncurrent Assets [Member]
Total Fair Value, Assets	197	[1]	158	[1]
Noncurrent Assets [Member] | Commodity Contract [Member]
Total Fair Value, Assets	152		127
Noncurrent Assets [Member] | Interest Rate Contract [Member]
Total Fair Value, Assets	45		31
Current Liabilities [Member]
Total Fair Value, Liabilities	543	[2]	633	[2]
Current Liabilities [Member] | Commodity Contract [Member]
Total Fair Value, Liabilities	516		633
Current Liabilities [Member] | Interest Rate Contract [Member]
Total Fair Value, Liabilities	27
Noncurrent Liabilities [Member]
Total Fair Value, Liabilities	233	[3]	197	[3]
Noncurrent Liabilities [Member] | Commodity Contract [Member]
Total Fair Value, Liabilities	226		192
Noncurrent Liabilities [Member] | Interest Rate Contract [Member]
Total Fair Value, Liabilities	$ 7		$ 5

[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.