Commitments and Contingencies (Lease Commitments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Loss Contingencies [Line Items]
2015	$ 63
2016	57
2017	49
2018	43
2019	36
Thereafter	79
Total	327
Virginia Electric and Power Company
Loss Contingencies [Line Items]
2015	30
2016	26
2017	21
2018	18
2019	12
Thereafter	26
Total	133
Dominion Gas Holdings, LLC
Loss Contingencies [Line Items]
2015	28
2016	25
2017	23
2018	21
2019	19
Thereafter	25
Total	$ 141