v3.6.0.2

SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - VARIABLE INTEREST ENTITIES (Details) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | Jun. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2016 USD ($) MW | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Investments [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment | $ 2,080 |  |  |  | $ 2,889 |  |  |  | $ 2,080 | $ 2,889 |  |
Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 349 |  |  |  | 403 |  |  |  | 349 | 403 | $ 570 | $ 904
Restricted cash | 66 |  |  |  | 27 |  |  |  | 66 | 27 |  |
Inventories | 258 |  |  |  | 298 |  |  |  | 258 | 298 |  |
Other | 271 |  |  |  | 267 |  |  |  | 271 | 267 |  |
Total current assets | 3,110 |  |  |  | 2,891 |  |  |  | 3,110 | 2,891 |  |
Restricted cash | 10 |  |  |  | 20 |  |  |  | 10 | 20 |  |
Property, plant and equipment, net | 32,931 |  |  |  | 28,039 |  |  |  | 32,931 | 28,039 |  |
Total assets | 47,786 |  |  |  | 41,150 |  |  |  | 47,786 | 41,150 | 39,651 |
Liabilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Current portion of long-term debt | 913 |  |  |  | 907 |  |  |  | 913 | 907 |  |
Fixed-price contracts and other derivatives | 83 |  |  |  | 56 |  |  |  | 83 | 56 |  |
Other | 557 |  |  |  | 551 |  |  |  | 557 | 551 |  |
Total current liabilities | 5,927 |  |  |  | 4,612 |  |  |  | 5,927 | 4,612 |  |
Asset retirement obligations | 2,431 |  |  |  | 2,126 |  |  |  | 2,431 | 2,126 |  |
Long-term debt | 14,429 |  |  |  | 13,134 |  |  |  | 14,429 | 13,134 |  |
Fixed-price contracts and other derivatives | 405 |  |  |  | 240 |  |  |  | 405 | 240 |  |
Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Other noncontrolling interests | 2,270 |  |  |  | 750 |  |  |  | 2,270 | 750 |  |
Total liabilities and equity | 47,786 |  |  |  | 41,150 |  |  |  | 47,786 | 41,150 |  |
Net assets less other noncontrolling interests | 12,951 |  |  |  | 11,809 |  |  |  | 12,951 | 11,809 |  |
Operating Expenses [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Operation and maintenance |  |  |  |  |  |  |  |  | 2,970 | 2,886 | 2,935 |
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,312 | 1,250 | 1,156 |
Interest expense |  |  |  |  |  |  |  |  | (553) | (561) | (554) |
(Loss) income before taxes/Net (loss) income |  |  |  |  |  |  |  |  | 1,519 | 1,448 | 1,262 |
Losses (earnings) attributable to noncontrolling interest |  |  |  |  |  |  |  |  | (148) | (98) | (100) |
Earnings attributable to common shares | 379 | $ 622 | $ 16 | $ 353 | 369 | $ 248 | $ 295 | $ 437 | 1,370 | 1,349 | 1,161 |
San Diego Gas and Electric Company [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 8 |  |  |  | 20 |  |  |  | 8 | 20 | 8 | $ 27
Restricted cash | 11 |  |  |  | 23 |  |  |  | 11 | 23 |  |
Inventories | 80 |  |  |  | 75 |  |  |  | 80 | 75 |  |
Other | 19 |  |  |  | 20 |  |  |  | 19 | 20 |  |
Total current assets | 1,072 |  |  |  | 1,004 |  |  |  | 1,072 | 1,004 |  |
Restricted cash | 1 |  |  |  | 0 |  |  |  | 1 | 0 |  |
Property, plant and equipment, net | 13,250 |  |  |  | 12,256 |  |  |  | 13,250 | 12,256 |  |
Total assets | 17,719 |  |  |  | 16,515 |  |  |  | 17,719 | 16,515 |  |
Liabilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Current portion of long-term debt | 191 |  |  |  | 50 |  |  |  | 191 | 50 |  |
Fixed-price contracts and other derivatives | 61 |  |  |  | 51 |  |  |  | 61 | 51 |  |
Other | 82 |  |  |  | 101 |  |  |  | 82 | 101 |  |
Total current liabilities | 1,168 |  |  |  | 1,207 |  |  |  | 1,168 | 1,207 |  |
Asset retirement obligations | 751 |  |  |  | 729 |  |  |  | 751 | 729 |  |
Long-term debt | 4,658 |  |  |  | 4,455 |  |  |  | 4,658 | 4,455 |  |
Fixed-price contracts and other derivatives | 189 |  |  |  | 106 |  |  |  | 189 | 106 |  |
Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Other noncontrolling interests | 37 |  |  |  | 53 |  |  |  | 37 | 53 |  |
Total liabilities and equity | 17,719 |  |  |  | 16,515 |  |  |  | 17,719 | 16,515 |  |
Net assets less other noncontrolling interests | 5,641 |  |  |  | 5,223 |  |  |  | 5,641 | 5,223 |  |
Operating Expenses [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 990 | 1,058 | 959 |
Interest expense |  |  |  |  |  |  |  |  | (195) | (204) | (202) |
(Loss) income before taxes/Net (loss) income |  |  |  |  |  |  |  |  | 565 | 606 | 527 |
Losses (earnings) attributable to noncontrolling interest |  |  |  |  |  |  |  |  | 5 | (19) | (20) |
Earnings attributable to common shares |  |  |  |  |  |  |  |  | $ 570 | 587 | 507 |
San Diego Gas and Electric Company [Member] | Otay Mesa VIE [Member] |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Generating capacity (in mw) | MW |  |  |  |  |  |  |  |  | 605 |  |  |
Put option | 280 |  |  |  |  |  |  |  | $ 280 |  |  |
Investments [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Equity of Variable interest entity | 37 |  |  |  | 53 |  |  |  | 37 | 53 |  |
Secured debt of variable interest entity | 305 |  |  |  |  |  |  |  | 305 |  |  |
Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 6 |  |  |  | 5 |  |  |  | 6 | 5 |  |
Restricted cash | 11 |  |  |  | 23 |  |  |  | 11 | 23 |  |
Inventories | 3 |  |  |  | 3 |  |  |  | 3 | 3 |  |
Other | 2 |  |  |  | 0 |  |  |  | 2 | 0 |  |
Total current assets | 22 |  |  |  | 31 |  |  |  | 22 | 31 |  |
Restricted cash | 1 |  |  |  | 0 |  |  |  | 1 | 0 |  |
Property, plant and equipment, net | 354 |  |  |  | 383 |  |  |  | 354 | 383 |  |
Total assets | 377 |  |  |  | 414 |  |  |  | 377 | 414 |  |
Liabilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Current portion of long-term debt | 10 |  |  |  | 10 |  |  |  | 10 | 10 |  |
Fixed-price contracts and other derivatives | 13 |  |  |  | 14 |  |  |  | 13 | 14 |  |
Other | 5 |  |  |  | 5 |  |  |  | 5 | 5 |  |
Total current liabilities | 28 |  |  |  | 29 |  |  |  | 28 | 29 |  |
Long-term debt | 293 |  |  |  | 303 |  |  |  | 293 | 303 |  |
Fixed-price contracts and other derivatives | 12 |  |  |  | 23 |  |  |  | 12 | 23 |  |
Deferred credits and other | 7 |  |  |  | 6 |  |  |  | 7 | 6 |  |
Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Other noncontrolling interests | 37 |  |  |  | 53 |  |  |  | 37 | 53 |  |
Total liabilities and equity | 377 |  |  |  | 414 |  |  |  | 377 | 414 |  |
Operating Expenses [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Cost of electric fuel and purchased power |  |  |  |  |  |  |  |  | (79) | (83) | (83) |
Operation and maintenance |  |  |  |  |  |  |  |  | 29 | 19 | 19 |
Depreciation and amortization |  |  |  |  |  |  |  |  | 35 | 26 | 27 |
Total operating expenses |  |  |  |  |  |  |  |  | (15) | (38) | (37) |
Operating income |  |  |  |  |  |  |  |  | 15 | 38 | 37 |
Interest expense |  |  |  |  |  |  |  |  | (20) | (19) | (17) |
(Loss) income before taxes/Net (loss) income |  |  |  |  |  |  |  |  | (5) | 19 | 20 |
Losses (earnings) attributable to noncontrolling interest |  |  |  |  |  |  |  |  | 5 | (19) | (20) |
Earnings attributable to common shares |  |  |  |  |  |  |  |  | 0 | 0 | $ 0 |
Sempra Renewables [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Inventories | 4 |  |  |  | 3 |  |  |  | 4 | 3 |  |
Sempra Renewables [Member] | Noncontrolling Tax Equity Investors [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 88 |  |  |  |  |  |  |  | 88 |  |  |
Accounts receivable | 3 |  |  |  |  |  |  |  | 3 |  |  |
Total current assets | 91 |  |  |  |  |  |  |  | 91 |  |  |
Property, plant and equipment, net | 926 |  |  |  |  |  |  |  | 926 |  |  |
Total assets | 1,017 |  |  |  |  |  |  |  | 1,017 |  |  |
Liabilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable | 68 |  |  |  |  |  |  |  | 68 |  |  |
Other | 7 |  |  |  |  |  |  |  | 7 |  |  |
Total current liabilities | 75 |  |  |  |  |  |  |  | 75 |  |  |
Asset retirement obligations | 27 |  |  |  |  |  |  |  | 27 |  |  |
Total liabilities | 102 |  |  |  |  |  |  |  | 102 |  |  |
Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Other noncontrolling interests | 468 |  |  |  |  |  |  |  | 468 |  |  |
Net assets less other noncontrolling interests | 447 |  |  |  |  |  |  |  | 447 |  |  |
Sempra LNG and Midstream [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Inventories | 82 |  |  |  | 98 |  |  |  | 82 | 98 |  |
Sempra LNG and Midstream [Member] | Cameron LNG Holdings [Member] |  |  |  |  |  |  |  |  |  |  |  |
Investments [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment | $ 997 |  |  |  | $ 983 |  |  |  | $ 997 | $ 983 |  |

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