COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
San Diego Gas and Electric Company and Subsidiary [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Purchased Power Commitments, Payments Due, Current	$ 11
Increase (Decrease) In Purchased Power Commitments, Payments Due In Two Years	(7)
Increase (Decrease) In Purchased Power Commitments, Payments Due In Three Years	37
Increase (Decrease) In Purchased Power Commitments, Payments Due In Four Years	36
Increase (Decrease) In Purchased Power Commitments, Payments Due In Five Years	34
Increase (Decrease) In Purchased Power Commitments, Payments Due Thereafter	631
Increase (Decrease) In Purchase Commitment Amount	742
Southern California Gas Company [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Natural Gas Contracts Commitments	(45)
Sempra Natural Gas [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due, Current	(121)
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due In Two Years	22
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due In Three Years	10
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due In Four Years	19
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due In Five Years	24
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due Thereafter	626
Increase (Decrease) In Natural Gas Contracts Commitments	(40)
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due, Current	(36)
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Two Years	(3)
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Three Years	(1)
Sempra Renewables [Member]
Operating Leases [Line Items]
Increase (Decrease) In Operating Lease Future Minimum Payments, Due Current	(2)
Increase (Decrease) In Operating Lease Future Minimum Payments, Due In Two Years	(2)
Increase (Decrease) In Operating Lease Future Minimum Payments, Due In Three Years	(2)
Increase (Decrease) In Operating Lease Future Minimum Payments, Due In Four Years	(2)
Increase (Decrease) In Operating Lease Future Minimum Payments, Due In Five Years	(2)
Increase (Decrease) In Operating Lease Future Minimum Payments, Due Thereafter	(72)
Increase (Decrease) In Operating Leases Amount	(82)
Aliso Canyon Turbine And Pipeline Safety Enhancement Program [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Purchase Commitment Amount	159
Increase (Decrease) In Construction Commitments, Payments Due, Current	86
Increase (Decrease) In Construction Commitments, Payments Due In Two Years	55
Increase (Decrease) In Construction Commitments, Payments Due In Three Years	12
Increase (Decrease) In Construction Commitments, Payments Due In Four Years	6
Cameron L N G [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount	6,000
ECO Substation And South Bay Substation [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Purchase Commitment Amount	99
Increase (Decrease) In Construction Commitments, Payments Due, Current	60
Increase (Decrease) In Construction Commitments, Payments Due In Two Years	36
Increase (Decrease) In Construction Commitments, Payments Due In Three Years	3
Copper Mountain Solar 3 [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Purchase Commitment Amount	(489)
Increase (Decrease) In Construction Commitments, Payments Due, Current	(449)
Increase (Decrease) In Construction Commitments, Payments Due In Two Years	(40)
Sonora Pipeline Project [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Purchase Commitment Amount	9
First Limited Notice To Proceed [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount	$ 27