COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2013
San Diego Gas and Electric Company and Subsidiary [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Purchased Power Commitments, Payments Due, Current	$ (1)
Increase (Decrease) In Purchased Power Commitments, Payments Due In Two Years	77
Increase (Decrease) In Purchased Power Commitments, Payments Due In Three Years	140
Increase (Decrease) In Purchased Power Commitments, Payments Due In Four Years	141
Increase (Decrease) In Purchased Power Commitments, Payments Due In Five Years	141
Increase (Decrease) In Purchased Power Commitments, Payments Due Thereafter	2,600
Increase (Decrease) In Purchase Commitment Amount	3,100
Operating Leases [Line Items]
Operating Leases Future Minimum Payments, Due Current	(18)
Operating Leases, Future Minimum Payments, Due in Two Years	3
Operating Leases, Future Minimum Payments, Due in Three Years	3
Operating Leases, Future Minimum Payments, Due in Four Years	3
Operating Leases, Future Minimum Payments, Due in Five Years	1
Operating Leases, Future Minimum Payments, Due Thereafter	84
Southern California Gas Company [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Natural Gas Contracts Commitments	156
Decrease In Natural Gas Contracts Commitments, Fulfillment	554
Increase In Natural Gas Contracts Commitments, New Contracts	710
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due, Current	(357)
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Two Years	245
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Three Years	41
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Four Years	67
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Five Years	70
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due Thereafter	90
Sempra Natural Gas [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due, Current	(424)
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due In Two Years	(37)
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due In Three Years	(42)
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due In Four Years	(59)
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due In Five Years	(66)
Increase (Decrease) In Liquefied Natural Gas Commitments, Payments Due Thereafter	(731)
Increase (Decrease) In Natural Gas Contracts Commitments	22
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due, Current	(36)
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Two Years	10
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Three Years	7
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Four Years	7
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due In Five Years	7
Increase (Decrease) In Natural Gas Contracts Commitments, Payments Due Thereafter	27
Sempra Natural Gas [Member] | Operations And Maintenance Mesquite Power [Member]
Payments Under Contractual Commitments [Line Items]
Contractual Commitments, Payments Due, Current	1
Contractual Commitments, Payments Due In Two Years	2
Contractual Commitments, Payments Due In Three Years	2
Contractual Commitments, Payments Due In Four Years	2
Contractual Commitments, Payments Due In Five Years	2
Contractual Commitments, Payments Due Thereafter	27
Sempra Renewables [Member]
Long-term Purchase Commitment [Line Items]
Guarantee Obligations Maximum Exposure	250
Guarantee Obligations Current Carrying Value	11
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	76
Sempra Rockies Marketing [Member]
Payments Under Contractual Commitments [Line Items]
Contractual Commitments, Payments Due, Current	3
Contractual Commitments, Payments Due In Two Years	14
Contractual Commitments, Payments Due In Three Years	14
Contractual Commitments, Payments Due In Four Years	14
Contractual Commitments, Payments Due In Five Years	14
Contractual Commitments, Payments Due Thereafter	83
Pipeline Safety Enhancement Program [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount	372
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Construction Commitments, Payments Due, Current	91
Increase (Decrease) In Construction Commitments, Payments Due In Two Years	71
Increase (Decrease) In Construction Commitments, Payments Due In Three Years	70
Increase (Decrease) In Construction Commitments, Payments Due In Four Years	70
Increase (Decrease) In Construction Commitments, Payments Due In Five Years	70
Energia Sierra Juarez wind project [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount	215
Energia Sierra Juarez Wind and Sasabe-Guaymas projects [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Construction Commitments, Payments Due, Current	12
Increase (Decrease) In Construction Commitments, Payments Due In Two Years	219
Increase (Decrease) In Construction Commitments, Payments Due In Three Years	179
Increase (Decrease) In Construction Commitments, Payments Due In Four Years	2
Sasabe-Guaymas Natural Gas Pipeline Project [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount	197
HQ Build to suit lease [Member]
Payments Under Contractual Commitments [Line Items]
Contractual Commitments, Payments Due In Three Years	4
Contractual Commitments, Payments Due In Four Years	10
Contractual Commitments, Payments Due In Five Years	10
Contractual Commitments, Payments Due Thereafter	287
Broken Bow 2 and Copper Mountain Solar 3 projects [Member]
Payments Under Contractual Commitments [Line Items]
Contractual Commitments, Payments Due, Current	106
Contractual Commitments, Payments Due In Two Years	453
Contractual Commitments, Payments Due In Three Years	38
Operations And Maintenance Mesquite Power [Member] | Sempra Natural Gas [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount	36
Broken Bow 2 [Member] | Sempra Renewables [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount	82
Copper Mountain Solar 3 [Member] | Sempra Renewables [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount	$ 515