v3.6.0.2

INCOME TAXES - DEFERRED INCOME TAXES (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Deferred Tax Liabilities, Gross [Abstract] |  |
Differences in financial and tax bases of fixed assets, investments and other assets | $ 6,111 | $ 5,283
Regulatory balancing accounts | 783 | 745
Property taxes | 63 | 61
Other deferred income tax liabilities | 143 | 100
Total deferred income tax liabilities | 7,100 | 6,189
Deferred Tax Assets, Gross [Abstract] |  |
Tax credits | 431 | 381
Net operating losses | 2,304 | 1,856
Compensation-related items | 252 | 252
Postretirement benefits | 434 | 446
Other deferred income tax assets | 87 | 179
Accrued expenses not yet deductible | 112 | 72
Deferred income tax assets before valuation allowances | 3,620 | 3,186
Less: valuation allowances | 31 | 34
Total deferred income tax assets | 3,589 | 3,152
Net deferred income tax liability | 3,511 | 3,037
Deferred income tax asset, noncurrent | 234 | 120
Deferred income tax liabilities, noncurrent | 3,745 | 3,157
Parent Company [Member] |  |
Deferred Tax Assets, Gross [Abstract] |  |
Deferred income tax asset, noncurrent | 2,570 | 2,188
San Diego Gas and Electric Company [Member] |  |
Deferred Tax Liabilities, Gross [Abstract] |  |
Differences in financial and tax bases of fixed assets, investments and other assets | 2,549 | 2,392
Regulatory balancing accounts | 379 | 234
Property taxes | 42 | 42
Other deferred income tax liabilities | 10 | 5
Total deferred income tax liabilities | 2,980 | 2,673
Deferred Tax Assets, Gross [Abstract] |  |
Tax credits | 27 | 9
Net operating losses | 0 | 0
Compensation-related items | 8 | 11
Postretirement benefits | 98 | 90
Other deferred income tax assets | 11 | 9
State income taxes | 0 | 46
Accrued expenses not yet deductible | 7 | 36
Total deferred income tax assets | 151 | 201
Net deferred income tax liability | 2,829 | 2,472
Deferred income tax liabilities, noncurrent | 2,829 | 2,472
Southern California Gas Company [Member] |  |
Deferred Tax Liabilities, Gross [Abstract] |  |
Differences in financial and tax bases of fixed assets, investments and other assets | 1,699 | 1,473
Regulatory balancing accounts | 411 | 515
Property taxes | 21 | 20
Other deferred income tax liabilities | 4 | 5
Total deferred income tax liabilities | 2,135 | 2,013
Deferred Tax Assets, Gross [Abstract] |  |
Tax credits | 17 | 16
Net operating losses | 83 | 110
Compensation-related items | 32 | 42
Postretirement benefits | 244 | 268
Other deferred income tax assets | 11 | 12
State income taxes | 19 | 13
Accrued expenses not yet deductible | 20 | 20
Total deferred income tax assets | 426 | 481
Net deferred income tax liability | 1,709 | 1,532
Deferred income tax liabilities, noncurrent | $ 1,709 | $ 1,532

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