SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - OTHER INCOME, NET (Details) - USD ($) $ in Millions |
12 Months Ended | ||
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Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Other Income [Line Items] | |||
| Allowance for equity funds used during construction | $ 116 | $ 107 | $ 106 |
| Investment gains | 23 | 3 | 27 |
| Losses on interest rate and foreign exchange instruments, net | (32) | (4) | (15) |
| Foreign currency transaction losses | (1) | (7) | (15) |
| Sale of other investments | 5 | 11 | 2 |
| Electrical infrastructure relocation income | 10 | 7 | 21 |
| Regulatory Interest, net | 4 | 3 | 6 |
| Sundry, net | 7 | 6 | 5 |
| Total | 132 | 126 | 137 |
| San Diego Gas and Electric Company [Member] | |||
| Other Income [Line Items] | |||
| Allowance for equity funds used during construction | 46 | 37 | 37 |
| Regulatory Interest, net | 3 | 3 | 6 |
| Sundry, net | 1 | (4) | (3) |
| Total | 50 | 36 | 40 |
| Southern California Gas Company [Member] | |||
| Other Income [Line Items] | |||
| Allowance for equity funds used during construction | 40 | 36 | 26 |
| Regulatory Interest, net | 1 | 0 | 0 |
| Sundry, net | (9) | (6) | (6) |
| Total | $ 32 | $ 30 | $ 20 |
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- Definition Electrical infrastrucure reclocation income at Peru No definition available.
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- Definition Other Income [Line Items] No definition available.
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- Definition Regulatory interest, net. No definition available.
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- Definition Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The difference between the book value and the sale price of other nonspecific investments. This element is used when other, more specific, elements are not appropriate. This element refers to the gain (loss) included in earnings. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The component of the allowance for funds used during construction during the period based on an assumed rate of return on equity funds used in financing the construction of regulated assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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