v3.4.0.3

FAIR VALUE MEASUREMENTS - FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015
Carrying Amount |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [1],[2] | $ 13,761 | $ 13,761
Preferred Stock Of Subsidiaries Fair Value Disclosure |  | 20 | 20
Due from affiliate, noncurrent, Fair Value Disclosure | [3] | 173 | 175
Debt Instrument Increase Accrued Interest |  | 13 | 11
Unamortized Discount and Debt Issuance Costs |  | 106 | 107
Build-To-Suit and Capital Lease Obligations |  | 386 | 387
Carrying Amount | Otay Mesa Energy Center Loan Payable Currently Through April 2019 Member [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Debt Instrument Carrying Amount |  | 312 | 315
Carrying Amount | San Diego Gas and Electric Company [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [2],[4] | 4,285 | 4,304
Capital Lease Obligations |  | 243 | 244
Unamortized Discount and Debt Issuance Costs |  | 43 | 43
Carrying Amount | Southern California Gas Company [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [5] | 2,513 | 2,513
Preferred Stock Of Subsidiaries Fair Value Disclosure |  | 22 | 22
Capital Lease Obligations |  | 1 | 1
Unamortized Discount and Debt Issuance Costs |  | 24 | 24
Fair Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [1],[2] | 15,015 | 14,633
Preferred Stock Of Subsidiaries Fair Value Disclosure |  | 23 | 23
Due from affiliate, noncurrent, Fair Value Disclosure | [3] | 164 | 166
Fair Value | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [1],[2] | 0 | 0
Preferred Stock Of Subsidiaries Fair Value Disclosure |  | 0 | 0
Due from affiliate, noncurrent, Fair Value Disclosure | [3] | 0 | 0
Fair Value | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [1],[2] | 14,363 | 13,985
Preferred Stock Of Subsidiaries Fair Value Disclosure |  | 23 | 23
Due from affiliate, noncurrent, Fair Value Disclosure | [3] | 92 | 97
Fair Value | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [1],[2] | 652 | 648
Preferred Stock Of Subsidiaries Fair Value Disclosure |  | 0 | 0
Due from affiliate, noncurrent, Fair Value Disclosure | [3] | 72 | 69
Fair Value | San Diego Gas and Electric Company [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [2],[4] | 4,829 | 4,670
Fair Value | San Diego Gas and Electric Company [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [2],[4] | 0 | 0
Fair Value | San Diego Gas and Electric Company [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [2],[4] | 4,517 | 4,355
Fair Value | San Diego Gas and Electric Company [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [2],[4] | 312 | 315
Fair Value | Southern California Gas Company [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [5] | 2,731 | 2,621
Preferred Stock Of Subsidiaries Fair Value Disclosure |  | 25 | 25
Fair Value | Southern California Gas Company [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [5] | 0 | 0
Preferred Stock Of Subsidiaries Fair Value Disclosure |  | 0 | 0
Fair Value | Southern California Gas Company [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [5] | 2,731 | 2,621
Preferred Stock Of Subsidiaries Fair Value Disclosure |  | 25 | 25
Fair Value | Southern California Gas Company [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of financial instruments, Total long-term debt | [5] | 0 | 0
Preferred Stock Of Subsidiaries Fair Value Disclosure |  | $ 0 | $ 0
[1] | Before reductions for unamortized discount (net of premium) and debt issuance costs of $106 million and $107 million at March 31, 2016 and December 31, 2015, respectively, and excluding build-to-suit and capital lease obligations of $386 million and $387 million at March 31, 2016 and December 31, 2015, respectively. We discuss our long-term debt in Note 6 above and in Note 5 of the Notes to Consolidated Financial Statements in the Annual Report.
[2] | Level 3 instruments include $312 million and $315 million at March 31, 2016 and December 31, 2015, respectively, related to Otay Mesa VIE.
[3] | Excluding accumulated interest outstanding of $13 million and $11 million at March 31, 2016 and December 31, 2015, respectively.
[4] | Before reductions for unamortized discount and debt issuance costs of $43 million at March 31, 2016 and December 31, 2015, and excluding capital lease obligations of $243 million and $244 million at March 31, 2016 and December 31, 2015, respectively.
[5] | Before reductions for unamortized discount and debt issuance costs of $24 million at March 31, 2016 and December 31, 2015, and excluding capital lease obligations of $1 million at March 31, 2016 and December 31, 2015.

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 + Details
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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or 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 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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