COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2012
Luz Del Sur [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Purchased Power Commitments, Payments Due, Current	$ (291)
Increase (Decrease) In Purchased Power Commitments, Payments Due In Two Years	15
Increase (Decrease) In Purchased Power Commitments, Payments Due In Three Years	2
Increase (Decrease) In Purchased Power Commitments, Payments Due In Four Years	(1)
Increase (Decrease) In Purchased Power Commitments, Payments Due In Five Years	8
Increase (Decrease) In Purchased Power Commitments, Payments Due Thereafter	105
Chilquinta Energia [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Purchased Power Commitments, Payments Due, Current	(205)
Increase (Decrease) In Purchased Power Commitments, Payments Due In Two Years	28
Increase (Decrease) In Purchased Power Commitments, Payments Due In Three Years	32
Increase (Decrease) In Purchased Power Commitments, Payments Due In Four Years	34
Increase (Decrease) In Purchased Power Commitments, Payments Due In Five Years	34
Increase (Decrease) In Purchased Power Commitments, Payments Due Thereafter	335
San Diego Gas and Electric Company and Subsidiary [Member]
Payments Under Contractual Commitments [Line Items]
Contractual Commitments, Payments Due, Current	62
Contractual Commitments, Payments Due In Two Years	159
Contractual Commitments, Payments Due In Three Years	20
Increase (Decrease) In Purchased Power Commitments, Payments Due, Current	(47)
Increase (Decrease) In Purchased Power Commitments, Payments Due In Two Years	18
Increase (Decrease) In Purchased Power Commitments, Payments Due In Three Years	61
Increase (Decrease) In Purchased Power Commitments, Payments Due In Four Years	66
Increase (Decrease) In Purchased Power Commitments, Payments Due In Five Years	67
Increase (Decrease) In Purchased Power Commitments, Payments Due Thereafter	1,400
Increase (Decrease) In Purchase Commitment Amount	1,600
Southern California Gas Company [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Natural Gas Contracts Commitments	232
Decrease In Natural Gas Contracts Commitments, Fulfillment	359
Increase In Natural Gas Contracts Commitments, New Contracts	591
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due, Current	(231)
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Two Years	307
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Three Years	67
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Four Years	34
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Five Years	4
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due Thereafter	51
Sempra South American Utilities [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Purchase Commitment Amount	96
Sempra Mexico [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Natural Gas Contracts Commitments	(128)
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due, Current	(81)
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Two Years	(22)
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Three Years	(25)
Sempra Natural Gas [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due, Current	(384)
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due In Two Years	(9)
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due In Three Years	(18)
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due In Four Years	(27)
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due In Five Years	(33)
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due Thereafter	(523)
Increase (Decrease) In Natural Gas Contracts Commitments	73
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due, Current	(7)
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Two Years	14
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Three Years	10
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Four Years	11
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Five Years	11
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due Thereafter	34
Sempra Renewables [Member]
Operating Leases [Line Items]
Operating Leases, Future Minimum Payments, Due in Two Years	2
Operating Leases, Future Minimum Payments, Due in Three Years	2
Operating Leases, Future Minimum Payments, Due in Four Years	2
Operating Leases, Future Minimum Payments, Due in Five Years	2
Operating Leases, Future Minimum Payments, Due Thereafter	57
Sunrise Powerlink Construction [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Long-term Purchase Commitment [Line Items]
Contractual Commitment Annual Escalation Percentage	2.00%
Contractual Commitment Number of Years	58
Contractual Commitment Future Annual Payment Amount	3
Contractual Commitment Present Value Future Payments, Regulatory Asset	116
Contractual Commitment Future Payments, Liability	113
Natural Gas Infrastructure Construction [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount	11
Natural Gas Infrastructure Construction [Member] | Southern California Gas Company [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount	60
Electric Distribution And Generation Plant [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount	34
ECO Substation [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount	196
Citizens Sunrise Transmission [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Long-term Purchase Commitment [Line Items]
Contractual Commitment Number of Years	30
Proceeds From Long Term Transmission Agreement	$ 85