COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS 2 (Details)	3 Months Ended
	Sep. 30, 2015 USD ($)
San Diego Gas and Electric Company [Member] | Purchased Power Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	$ (362,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, Current	22,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years	26,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years	(14,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Four Years	(16,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Five Years	(21,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Thereafter	(359,000,000)
San Diego Gas and Electric Company [Member] | Construction and Development Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	(66,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, Current	(144,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years	25,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years	19,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Four Years	12,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Five Years	17,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Thereafter	5,000,000
Southern California Gas Company [Member] | Natural Gas Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	(120,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, Current	(114,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years	(1,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years	(1,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Four Years	(1,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Five Years	(1,000,000)
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	(137,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, Current	(164,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years	20,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years	7,000,000
Sempra Mexico [Member] | Construction and Development Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	41,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, Current	(19,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years	59,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Thereafter	1,000,000
Sempra Natural Gas [Member] | Natural Gas Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	(345,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, Current	(219,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years	(41,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years	(45,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Four Years	(33,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Five Years	1,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Thereafter	(8,000,000)
Sempra Natural Gas [Member] | Liquefied Natural Gas Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitments, Payments Due, Current	(322,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years	(128,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years	(163,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Four Years	(194,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Five Years	(195,000,000)
Increase (Decrease) In Contractual Commitments, Payments Due, In Thereafter	$ (1,400,000,000)
Escalation percentage beyond year 2024	1.00%
Sempra Natural Gas [Member] | Construction and Development Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	$ 46,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, Current	46,000,000
Sempra Natural Gas [Member] | Other Commitments [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Long Term Contracts	(33,000,000)
Sempra Renewables [Member] | Construction and Development Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Contractual Commitment Amount	554,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, Current	90,000,000
Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years	$ 464,000,000