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QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, shares in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | [1] | Dec. 31, 2016 | [1]
Selected Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 3,221,000,000 | $ 2,940,000,000 | $ 2,564,000,000 | $ 2,962,000,000 | $ 2,964,000,000 | $ 2,679,000,000 | $ 2,533,000,000 | $ 3,031,000,000 | $ 11,687,000,000 | $ 11,207,000,000 | $ 10,183,000,000
Expenses and other income | 2,160,000,000 | 2,513,000,000 | 3,673,000,000 | 2,295,000,000 | 2,567,000,000 | 2,674,000,000 | 2,136,000,000 | 2,279,000,000 |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 10,046,000,000 | 9,776,000,000 | 9,261,000,000
Net income | 964,000,000 | 334,000,000 | (530,000,000) | 358,000,000 | (451,000,000) | 102,000,000 | 248,000,000 | 452,000,000 | 1,126,000,000 | 351,000,000 | 1,519,000,000
(Earnings) losses attributable to noncontrolling interest |  |  |  |  |  |  |  |  | (76,000,000) | (94,000,000) | (148,000,000)
Earnings attributable to common shares |  |  |  |  |  |  |  |  | $ 924,000,000 | $ 256,000,000 | $ 1,370,000,000
Earnings | $ 864,000,000 | $ 274,000,000 | $ (561,000,000) | $ 347,000,000 | $ (501,000,000) | $ 57,000,000 | $ 259,000,000 | $ 441,000,000 |  |  |
Basic earnings per common share (in dollars per share) | $ 3.51 | $ 1.22 | $ (1.99) | $ 1.39 | $ (1.80) | $ 0.41 | $ 0.99 | $ 1.80 | $ 3.45 | $ 1.02 | $ 5.48
Basic earnings per common share attributable to Sempra Energy (in dollars per share) | $ 3.15 | $ 1.00 | $ (2.11) | $ 1.34 | $ (1.99) | $ 0.23 | $ 1.03 | $ 1.76 |  |  |
Weighted-average number of shares outstanding, basic (in shares) | 274,300 | 273,900 | 265,800 | 257,900 | 251,900 | 251,700 | 251,400 | 251,100 | 268,072 | 251,545 | 250,217
Diluted earnings per common share (in dollars per share) | $ 3.25 | $ 1.21 | $ (1.99) | $ 1.38 | $ (1.80) | $ 0.41 | $ 0.98 | $ 1.79 | $ 3.42 | $ 1.01 | $ 5.46
Diluted earnings per common share attributable to Sempra Energy (in dollars per share) | $ 3.03 | $ 0.99 | $ (2.11) | $ 1.33 | $ (1.99) | $ 0.22 | $ 1.03 | $ 1.75 |  |  |
Weighted-average number of shares outstanding, diluted (in shares) | 296,400 | 275,900 | 265,800 | 259,500 | 251,900 | 253,400 | 252,800 | 252,200 | 269,852 | 252,300 | 251,155
Dividends on preferred stock | $ (36,000,000) |  |  |  |  |  |  |  | $ (125,000,000) | $ 0 | $ 0
San Diego Gas and Electric Company [Member] |  |  |  |  |  |  |  |  |  |  |
Selected Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues | 1,163,000,000 | $ 1,299,000,000 | $ 1,051,000,000 | $ 1,055,000,000 | $ 1,125,000,000 | $ 1,236,000,000 | $ 1,058,000,000 | $ 1,057,000,000 | 4,568,000,000 | 4,476,000,000 | 4,253,000,000
Operating expenses | 916,000,000 | 999,000,000 | 836,000,000 | 807,000,000 | 869,000,000 | 1,294,000,000 | 821,000,000 | 783,000,000 | 3,558,000,000 | 3,767,000,000 | 3,277,000,000
Operating income | 247,000,000 | 300,000,000 | 215,000,000 | 248,000,000 | 256,000,000 | (58,000,000) | 237,000,000 | 274,000,000 | 1,010,000,000 | 709,000,000 | 976,000,000
Net income | 145,000,000 | 216,000,000 | 146,000,000 | 169,000,000 | 130,000,000 | (19,000,000) | 153,000,000 | 157,000,000 | 676,000,000 | 421,000,000 | 565,000,000
(Earnings) losses attributable to noncontrolling interest | 3,000,000 | (11,000,000) | 0 | 1,000,000 | 1,000,000 | (9,000,000) | (4,000,000) | (2,000,000) | (7,000,000) | (14,000,000) | 5,000,000
Earnings attributable to common shares | 148,000,000 | 205,000,000 | 146,000,000 | 170,000,000 | 131,000,000 | (28,000,000) | 149,000,000 | 155,000,000 | 669,000,000 | 407,000,000 | 570,000,000
Southern California Gas Company [Member] |  |  |  |  |  |  |  |  |  |  |
Selected Quarterly Financial Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues | 1,262,000,000 | 802,000,000 | 772,000,000 | 1,126,000,000 | 1,090,000,000 | 684,000,000 | 770,000,000 | 1,241,000,000 | 3,962,000,000 | 3,785,000,000 | 3,471,000,000
Operating expenses | 1,023,000,000 | 797,000,000 | 703,000,000 | 848,000,000 | 860,000,000 | 679,000,000 | 690,000,000 | 929,000,000 | 3,371,000,000 | 3,158,000,000 | 2,920,000,000
Operating income | 239,000,000 | 5,000,000 | 69,000,000 | 278,000,000 | 230,000,000 | 5,000,000 | 80,000,000 | 312,000,000 | 591,000,000 | 627,000,000 | 551,000,000
Net income | 156,000,000 | (14,000,000) | 34,000,000 | 225,000,000 | 128,000,000 | 7,000,000 | 59,000,000 | 203,000,000 | 401,000,000 | 397,000,000 | 350,000,000
Earnings attributable to common shares | 156,000,000 | (14,000,000) | 33,000,000 | 225,000,000 | 128,000,000 | 7,000,000 | 58,000,000 | 203,000,000 | 400,000,000 | 396,000,000 | 349,000,000
Dividends on preferred stock | $ 0 | $ 0 | $ (1,000,000) | $ 0 | $ 0 | $ 0 | $ (1,000,000) | $ 0 | $ (1,000,000) | $ (1,000,000) | $ (1,000,000)
[1] | As adjusted for the retrospective adoption of ASU 2017-07, which we discuss in Note 2, and a reclassification to conform to current year presentation, which we discuss in Note 1.

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