Derivatives and Hedge Accounting Activities (Fair Values of our Derivatives) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	$ 828		$ 1,070
Total Fair Value, Liabilities	661		1,157
Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	518		705
Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	482		671
Current Assets | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	36		34
Noncurrent Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	310		365	[1]
Noncurrent Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	253		294
Noncurrent Assets | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	57		71
Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	510		951
Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	444		692
Current Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	66		259
Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	151		206	[2]
Noncurrent Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	151		196
Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities			10
Fair Value - Derivatives under Hedge Accounting
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	326		479
Total Fair Value, Liabilities	227		502
Fair Value - Derivatives under Hedge Accounting | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	139		210
Fair Value - Derivatives under Hedge Accounting | Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	103		176
Fair Value - Derivatives under Hedge Accounting | Current Assets | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	36		34
Fair Value - Derivatives under Hedge Accounting | Noncurrent Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	187		269	[1]
Fair Value - Derivatives under Hedge Accounting | Noncurrent Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	130		198
Fair Value - Derivatives under Hedge Accounting | Noncurrent Assets | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	57		71
Fair Value - Derivatives under Hedge Accounting | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	169		384
Fair Value - Derivatives under Hedge Accounting | Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	103		162
Fair Value - Derivatives under Hedge Accounting | Current Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	66		222
Fair Value - Derivatives under Hedge Accounting | Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	58		118	[2]
Fair Value - Derivatives under Hedge Accounting | Noncurrent Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	58		118
Fair Value - Derivatives under Hedge Accounting | Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities			0
Fair Value - Derivatives not under Hedge Accounting
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	502		591
Total Fair Value, Liabilities	434		655
Fair Value - Derivatives not under Hedge Accounting | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	379		495
Fair Value - Derivatives not under Hedge Accounting | Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	379		495
Fair Value - Derivatives not under Hedge Accounting | Current Assets | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	0		0
Fair Value - Derivatives not under Hedge Accounting | Noncurrent Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	123		96	[1]
Fair Value - Derivatives not under Hedge Accounting | Noncurrent Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	123		96
Fair Value - Derivatives not under Hedge Accounting | Noncurrent Assets | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	0		0
Fair Value - Derivatives not under Hedge Accounting | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	341		567
Fair Value - Derivatives not under Hedge Accounting | Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	341		530
Fair Value - Derivatives not under Hedge Accounting | Current Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	0		37
Fair Value - Derivatives not under Hedge Accounting | Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	93		88	[2]
Fair Value - Derivatives not under Hedge Accounting | Noncurrent Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	93		78
Fair Value - Derivatives not under Hedge Accounting | Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities			10
Virginia Electric and Power Company
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	6		2
Total Fair Value, Liabilities	34		147
Virginia Electric and Power Company | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	6	[3]	2	[3]
Virginia Electric and Power Company | Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	6		2
Virginia Electric and Power Company | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	33		135
Virginia Electric and Power Company | Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	8		45
Virginia Electric and Power Company | Current Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	25		90
Virginia Electric and Power Company | Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	1	[4]	12	[4]
Virginia Electric and Power Company | Noncurrent Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	1		2
Virginia Electric and Power Company | Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities			10
Virginia Electric and Power Company | Fair Value - Derivatives under Hedge Accounting
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	1		0
Total Fair Value, Liabilities	31		69
Virginia Electric and Power Company | Fair Value - Derivatives under Hedge Accounting | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	1	[3]	0	[3]
Virginia Electric and Power Company | Fair Value - Derivatives under Hedge Accounting | Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	1		0
Virginia Electric and Power Company | Fair Value - Derivatives under Hedge Accounting | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	30		67
Virginia Electric and Power Company | Fair Value - Derivatives under Hedge Accounting | Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	5		14
Virginia Electric and Power Company | Fair Value - Derivatives under Hedge Accounting | Current Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	25		53
Virginia Electric and Power Company | Fair Value - Derivatives under Hedge Accounting | Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	1	[4]	2	[4]
Virginia Electric and Power Company | Fair Value - Derivatives under Hedge Accounting | Noncurrent Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	1		2
Virginia Electric and Power Company | Fair Value - Derivatives under Hedge Accounting | Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities			0
Virginia Electric and Power Company | Fair Value - Derivatives not under Hedge Accounting
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	5		2
Total Fair Value, Liabilities	3		78
Virginia Electric and Power Company | Fair Value - Derivatives not under Hedge Accounting | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	5	[3]	2	[3]
Virginia Electric and Power Company | Fair Value - Derivatives not under Hedge Accounting | Current Assets | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Assets	5		2
Virginia Electric and Power Company | Fair Value - Derivatives not under Hedge Accounting | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	3		68
Virginia Electric and Power Company | Fair Value - Derivatives not under Hedge Accounting | Current Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	3		31
Virginia Electric and Power Company | Fair Value - Derivatives not under Hedge Accounting | Current Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	0		37
Virginia Electric and Power Company | Fair Value - Derivatives not under Hedge Accounting | Noncurrent Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	0	[4]	10	[4]
Virginia Electric and Power Company | Fair Value - Derivatives not under Hedge Accounting | Noncurrent Liabilities | Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities	0		0
Virginia Electric and Power Company | Fair Value - Derivatives not under Hedge Accounting | Noncurrent Liabilities | Interest rate
Derivative Instruments, Gain (Loss) [Line Items]
Total Fair Value, Liabilities			$ 10

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

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

[3] Current derivative assets are presented in other current assets in Virginia Power's Consolidated Balance Sheets.

[4] Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in Virginia Power's Consolidated Balance Sheets.