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REVENUES - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | $ 3,043 | $ 2,471
Utilities regulatory revenues | (258) | (31)
Other revenues | 113 | 96
Total revenues | 2,898 | 2,536
Utilities service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 2,773 | 2,221
Midstream service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 179 | 176
Renewables service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 24 | 33
Other service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 67 | 41
Electric market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 1,087 | 1,034
Gas market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 1,956 | 1,437
Operating Segments [Member] | San Diego Gas and Electric Company [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 1,236 | 1,131
Utilities regulatory revenues | (91) | (76)
Other revenues | 0 | 0
Total revenues | 1,145 | 1,055
Operating Segments [Member] | San Diego Gas and Electric Company [Member] | Utilities service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 1,236 | 1,131
Operating Segments [Member] | San Diego Gas and Electric Company [Member] | Midstream service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments [Member] | San Diego Gas and Electric Company [Member] | Renewables service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments [Member] | San Diego Gas and Electric Company [Member] | Other service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments [Member] | San Diego Gas and Electric Company [Member] | Electric market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 997 | 963
Operating Segments [Member] | San Diego Gas and Electric Company [Member] | Gas market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 239 | 168
Operating Segments [Member] | Southern California Gas Company [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 1,528 | 1,081
Utilities regulatory revenues | (167) | 45
Other revenues | 0 | 0
Total revenues | 1,361 | 1,126
Operating Segments [Member] | Southern California Gas Company [Member] | Utilities service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 1,528 | 1,081
Operating Segments [Member] | Southern California Gas Company [Member] | Midstream service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments [Member] | Southern California Gas Company [Member] | Renewables service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments [Member] | Southern California Gas Company [Member] | Other service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments [Member] | Southern California Gas Company [Member] | Electric market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments [Member] | Southern California Gas Company [Member] | Gas market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 1,528 | 1,081
Operating Segments [Member] | Sempra Mexico [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 284 | 234
Utilities regulatory revenues | 0 | 0
Other revenues | 99 | 74
Total revenues | 383 | 308
Operating Segments [Member] | Sempra Mexico [Member] | Utilities service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 27 | 28
Operating Segments [Member] | Sempra Mexico [Member] | Midstream service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 171 | 143
Operating Segments [Member] | Sempra Mexico [Member] | Renewables service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 20 | 22
Operating Segments [Member] | Sempra Mexico [Member] | Other service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 66 | 41
Operating Segments [Member] | Sempra Mexico [Member] | Electric market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 86 | 62
Operating Segments [Member] | Sempra Mexico [Member] | Gas market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 198 | 172
Operating Segments [Member] | Sempra Renewables [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 4 | 11
Utilities regulatory revenues | 0 | 0
Other revenues | 3 | 14
Total revenues | 7 | 25
Operating Segments [Member] | Sempra Renewables [Member] | Utilities service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments [Member] | Sempra Renewables [Member] | Midstream service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments [Member] | Sempra Renewables [Member] | Renewables service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 4 | 11
Operating Segments [Member] | Sempra Renewables [Member] | Other service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments [Member] | Sempra Renewables [Member] | Electric market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 4 | 11
Operating Segments [Member] | Sempra Renewables [Member] | Gas market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments [Member] | Sempra LNG [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 68 | 57
Utilities regulatory revenues | 0 | 0
Other revenues | 73 | 47
Total revenues | 141 | 104
Operating Segments [Member] | Sempra LNG [Member] | Utilities service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments [Member] | Sempra LNG [Member] | Midstream service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 67 | 54
Operating Segments [Member] | Sempra LNG [Member] | Renewables service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 1
Operating Segments [Member] | Sempra LNG [Member] | Other service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 1 | 2
Operating Segments [Member] | Sempra LNG [Member] | Electric market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 1 | 2
Operating Segments [Member] | Sempra LNG [Member] | Gas market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 67 | 55
Consolidating Adjustments [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | (77) | (43)
Utilities regulatory revenues | 0 | 0
Other revenues | (62) | (39)
Total revenues | (139) | (82)
Consolidating Adjustments [Member] | Utilities service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | (18) | (19)
Consolidating Adjustments [Member] | Midstream service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | (59) | (21)
Consolidating Adjustments [Member] | Renewables service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | (1)
Consolidating Adjustments [Member] | Other service line [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | (2)
Consolidating Adjustments [Member] | Electric market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | (1) | (4)
Consolidating Adjustments [Member] | Gas market [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | $ (76) | $ (39)

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