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INCOME TAXES (Tables)
 12 Months Ended
Dec. 31, 2015
Summary Of Positions For Which Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Abstract]  
Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible
POSSIBLE DECREASES IN UNRECOGNIZED INCOME TAX BENEFITS WITHIN 12 MONTHS
(Dollars in millions)
At December 31,
201520142013
Sempra Energy Consolidated:
Expiration of statutes of limitations on tax assessments $(2)$―$(7)
Potential resolution of audit issues with various
U.S. federal, state and local and non-U.S. taxing authorities(32)(61)(63)
$(34)$(61)$(70)
SDG&E:
Expiration of statutes of limitations on tax assessments $(1)$―$―
Potential resolution of audit issues with various
U.S. federal, state and local taxing authorities(8)(9)(14)
$(9)$(9)$(14)
SoCalGas:
Potential resolution of audit issues with various
U.S. federal, state and local taxing authorities$(22)$(15)$(11)
Schedule Of Effective Income Tax Rate Reconciliation [Abstract]  
Schedule Of Effective Income Tax Rate Reconciliation
RECONCILIATION OF FEDERAL INCOME TAX RATES TO EFFECTIVE INCOME TAX RATES
Years ended December 31,
201520142013
Sempra Energy Consolidated:
U.S. federal statutory income tax rate35%35%35%
Utility depreciation554
U.S. tax on repatriation of foreign earnings12―
Income tax restructuring related to IEnova stock offerings――4
State income taxes, net of federal income tax benefit1―1
Utility repairs expenditures(5)(5)(5)
Tax credits(4)(4)(3)
Self-developed software expenditures(3)(3)(3)
Resolution of prior years’ income tax items(3)(1)(3)
Non-U.S. earnings taxed at lower statutory income tax rates(2)(2)(3)
Allowance for equity funds used during construction(2)(2)(1)
Foreign exchange and inflation effects(2)(2)―
International tax reform―(1)1
Other, net(1)(2)(1)
Effective income tax rate20%20%26%
SDG&E:
U.S. federal statutory income tax rate35%35%35%
State income taxes, net of federal income tax benefit553
Depreciation445
SONGS tax regulatory asset write-off―2―
Repairs expenditures(4)(4)(4)
Self-developed software expenditures(3)(3)(3)
Allowance for equity funds used during construction(2)(2)(2)
Resolution of prior years’ income tax items(2)(2)(1)
Variable interest entity(1)(1)(1)
Other, net――(1)
Effective income tax rate32%34%31%
SoCalGas:
U.S. federal statutory income tax rate35%35%35%
Depreciation886
State income taxes, net of federal income tax benefit444
Repairs expenditures(10)(9)(9)
Self-developed software expenditures(6)(5)(6)
Resolution of prior years’ income tax items(3)(2)(5)
Allowance for equity funds used during construction(2)(2)(1)
Other, net(1)――
Effective income tax rate25%29%24%
Schedule Of Geographic Components Of Income Before Income Taxes And Equity Earnings Of Certain Unconsolidated Subsidiaries [Abstract]  
Schedule Of Geographic Components Of Income Before Income Taxes And Equity Earnings Of Certain Unconsolidated Subsidiaries [Text Block]
GEOGRAPHIC COMPONENTS
(Dollars in millions)
Years ended December 31,
201520142013
U.S.$1,189$1,014$941
Non-U.S.515510489
Total$1,704$1,524$1,430
Schedule Of Components Of Income Tax Expense [Abstract]  
Schedule Of Components Of Income Tax Expense
INCOME TAX EXPENSE (BENEFIT)
(Dollars in millions)
Years ended December 31,
201520142013
Sempra Energy Consolidated:
Current:
U.S. federal$3$(10)$(70)
U.S. state(24)(7)(5)
Non-U.S.123171107
Total 10215432
Deferred:
U.S. federal242237275
U.S. state34415
Non-U.S.(32)(91)48
Total 244150338
Deferred investment tax credits(5)(4)(4)
Total income tax expense$341$300$366
SDG&E:
Current:
U.S. federal$12$(5)$9
U.S. state775211
Total 894720
Deferred:
U.S. federal233220149
U.S. state(35)524
Total 198225173
Deferred investment tax credits(3)(2)(2)
Total income tax expense$284$270$191
SoCalGas:
Current:
U.S. federal$(1)$2$4
U.S. state127(5)
Total 119(1)
Deferred:
U.S. federal122117103
U.S. state71516
Total 129132119
Deferred investment tax credits(2)(2)(2)
Total income tax expense$138$139$116
Schedule Of Components Of Deferred Tax Assets And Liabilities [Abstract]  
Schedule Of Components Of Deferred Tax Assets And Liabilities
DEFERRED INCOME TAXES FOR SEMPRA ENERGY CONSOLIDATED
(Dollars in millions)
December 31,
20152014
Deferred income tax liabilities:
Differences in financial and tax bases of depreciable and amortizable assets$4,487$4,074
Regulatory balancing accounts745915
Property taxes6157
Differences in financial and tax bases of partnership interests(1)796650
Other deferred income tax liabilities10053
Total deferred income tax liabilities6,1895,749
Deferred income tax assets:
Tax credits381276
Net operating losses 1,8561,908
Compensation-related items252244
Postretirement benefits446433
Other deferred income tax assets179156
Litigation and other accruals not yet deductible7273
Deferred income tax assets before valuation allowances3,1863,090
Less: valuation allowances3439
Total deferred income tax assets3,1523,051
Net deferred income tax liability(2)$3,037$2,698
(1)Amounts primarily represent differences in financial and tax bases of depreciable and amortizable assets within our partnerships.
(2)At December 31, 2015, the net deferred income tax liability includes $120 million recorded as a noncurrent asset in Sundry on the Consolidated Balance Sheet.

DEFERRED INCOME TAXES FOR SDG&E AND SOCALGAS
(Dollars in millions)
SDG&ESoCalGas
December 31,December 31,
2015201420152014
Deferred income tax liabilities:
Differences in financial and tax bases of
utility plant and other assets$2,392$2,181$1,473$1,194
Regulatory balancing accounts234441515481
Property taxes42392018
Other55510
Total deferred income tax liabilities2,6732,6662,0131,703
Deferred income tax assets:
Net operating losses―29711064
Postretirement benefits9085268261
Compensation-related items1184240
State income taxes46271311
Litigation and other accruals not yet deductible36392023
Other18362839
Total deferred income tax assets 201492481438
Net deferred income tax liability$2,472$2,174$1,532$1,265
Income Tax Uncertainties [Abstract]  
Summary of Income Tax Contingencies
SUMMARY OF UNRECOGNIZED INCOME TAX BENEFITS
(Dollars in millions)
Years ended December 31,
201520142013
Sempra Energy Consolidated:
Total$87$117$90
Of the total, amounts related to tax positions that,
if recognized in future years, would
decrease the effective tax rate(1)$(83)$(114)$(86)
increase the effective tax rate(1)322119
SDG&E:
Total$20$14$17
Of the total, amounts related to tax positions that,
if recognized in future years, would
decrease the effective tax rate(1)$(16)$(11)$(14)
increase the effective tax rate(1)11611
SoCalGas:
Total$27$19$13
Of the total, amounts related to tax positions that,
if recognized in future years, would
decrease the effective tax rate(1)$(27)$(19)$(13)
increase the effective tax rate(1)21158
(1)Includes temporary book and tax differences that are treated as flow-through for ratemaking purposes, as discussed above.

RECONCILIATION OF UNRECOGNIZED INCOME TAX BENEFITS
(Dollars in millions)
201520142013
Sempra Energy Consolidated:
Balance as of January 1 $117$90$82
Increase in prior period tax positions103726
Decrease in prior period tax positions――(24)
Increase in current period tax positions857
Settlements with taxing authorities(48)(15)(1)
Balance as of December 31 $87$117$90
SDG&E:
Balance as of January 1 $14$17$12
Increase in prior period tax positions527
Decrease in prior period tax positions――(4)
Increase in current period tax positions2―2
Settlements with taxing authorities(1)(5)―
Balance as of December 31 $20$14$17
SoCalGas:
Balance as of January 1 $19$13$5
Increase in prior period tax positions224
Increase in current period tax positions645
Settlements with taxing authorities――(1)
Balance as of December 31 $27$19$13

INTEREST AND PENALTIES ASSOCIATED WITH UNRECOGNIZED INCOME TAX BENEFITS
(Dollars in millions)
Interest and penaltiesAccrued interest and penalties
Years ended December 31, December 31,
20152014201320152014
Sempra Energy Consolidated:
Interest (income) expense $(2)$(4)$1$1$―
Penalties―(3)―――
SDG&E:
Interest income$―$(1)$―$―$―
SoCalGas:
Interest income$―$―$(1)$―$―