COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS (Details) $ in Millions	6 Months Ended
Jun. 30, 2016 USD ($)
Sempra Energy [Member] \| Asset Retirement Obligation [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Asset Retirement Obligations	$ 342
San Diego Gas and Electric Company [Member] \| Asset Retirement Obligation [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Asset Retirement Obligations	26
Southern California Gas Company [Member] \| Asset Retirement Obligation [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Asset Retirement Obligations	316
Sempra Natural Gas [Member] \| Natural Gas Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Increase (Decrease) In Commitment Amount	(111)
Increase (Decrease) In Commitment Amount, Payments Due, Current	(97)
Increase (Decrease) In Commitment Amount, Payments Due, In Two Years	14
Increase (Decrease) In Commitment Amount, Payments Due, In Three Years	(8)
Increase (Decrease) In Commitment Amount, Payments Due, In Four Years	(16)
Increase (Decrease) In Commitment Amount, Payments Due, In Five Years	(4)
Charges Related To Permanent Capacity Releases, Pretax	206
Charges Related To Permanent Capacity Releases, After Tax	123
Obligation To Make Future Capacity Payments, Current	41
Obligation To Make Future Capacity Payments, Noncurrent	$ 118
Sempra Natural Gas [Member] \| Liquefied Natural Gas Contracts [Member]
Payments Under Contractual Commitments [Line Items]
Escalation Percentage Beyond Year 2028	1.00%
Increase (Decrease) In Commitment Amount, Payments Due, Current	$ (196)
Increase (Decrease) In Commitment Amount, Payments Due, In Two Years	61
Increase (Decrease) In Commitment Amount, Payments Due, In Three Years	13
Increase (Decrease) In Commitment Amount, Payments Due, In Four Years	(9)
Increase (Decrease) In Commitment Amount, Payments Due, In Five Years	(33)
Increase (Decrease) In Commitment Amount, Payments Due, In Thereafter	$ 108

Charges Related To Permanent Capacity Releases, After Tax.

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Escalation percentage.

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No definition available.

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- Definition

Obligation To Make Future Capacity Payments, Noncurrent.

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No definition available.

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable for the acquisition of merchandise, materials, supplies and services pertaining to construction projects such as a housing development or factory expansion not classified as trade payables. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

The increase (decrease) during the reporting period in the carrying amount of asset retirement obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
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- Definition

Other deductions and charges as defined.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Rule 15c3-1
-Number 240
-Section 15c3-1

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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