COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS 2 (Details) (USD $)	Mar. 31, 2015
San Diego Gas and Electric Company [Member] | Purchased Power Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	$ (339,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, Current	(20,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years	(16,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years	(17,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Four Years	(18,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Five Years	(23,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Thereafter	(245,000,000)
San Diego Gas and Electric Company [Member] | Construction and Development Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	(54,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, Current	(95,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years	20,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years	(4,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Four Years	1,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Five Years	24,000,000
Southern California Gas Company [Member] | Natural Gas Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	(43,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, Current	(41,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Thereafter	(2,000,000)
Southern California Gas Company [Member] | Construction and Development Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	(62,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, Current	(72,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years	7,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years	3,000,000
Sempra Mexico [Member] | Construction and Development Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	12,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, Current	12,000,000
Sempra Natural Gas [Member] | Natural Gas Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	(69,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, Current	(54,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years	1,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Five Years	(16,000,000)
Sempra Natural Gas [Member] | Liquefied Natural Gas Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitments, Payments Due, Current	(138,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years	(83,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years	(93,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Four Years	(109,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Five Years	(109,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Thereafter	(937,000,000)
Sempra Renewables [Member] | Construction and Development Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	26,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, Current	$ 26,000,000