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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($)
$ in Millions
Total
Series A Preferred Stock [Member]
Series B Preferred Stock [Member]
Preferred stock [Member]
Preferred stock [Member]
Series A Preferred Stock [Member]
Preferred stock [Member]
Series B Preferred Stock [Member]
Common Stock [Member]
Retained earnings [Member]
Retained earnings [Member]
Series A Preferred Stock [Member]
Retained earnings [Member]
Series B Preferred Stock [Member]
Accumulated other comprehensive income (loss) [Member]
Shareholders' equity [Member]
Shareholders' equity [Member]
Series A Preferred Stock [Member]
Shareholders' equity [Member]
Series B Preferred Stock [Member]
Noncontrolling Interest [Member]
San Diego Gas and Electric Company [Member]
San Diego Gas and Electric Company [Member]
Common Stock [Member]
San Diego Gas and Electric Company [Member]
Retained earnings [Member]
San Diego Gas and Electric Company [Member]
Accumulated other comprehensive income (loss) [Member]
San Diego Gas and Electric Company [Member]
Shareholders' equity [Member]
San Diego Gas and Electric Company [Member]
Noncontrolling Interest [Member]
Southern California Gas Company [Member]
Southern California Gas Company [Member]
Preferred stock [Member]
Southern California Gas Company [Member]
Common Stock [Member]
Southern California Gas Company [Member]
Retained earnings [Member]
Southern California Gas Company [Member]
Accumulated other comprehensive income (loss) [Member]
Beginning Balance at Dec. 31, 2016 $ 15,241     $ 0     $ 2,982 $ 10,717     $ (748) $ 12,951     $ 2,290 $ 5,678 $ 1,338 $ 4,311 $ (8) $ 5,641 $ 37 $ 3,510 $ 22 $ 866 $ 2,644 $ (22)
Net income 802 [1],[2]             758       758     44 291 [1],[2]   276   276 15 269 [2]     269  
Comprehensive income (loss) 86                   70 70     16 8     1 1 7 1       1
Share-based compensation expense 44           44         44                            
Preferred stock dividends declared                                           (1) [2]     (1)  
Common stock dividends declared (619)             (619)       (619)       (450)   (450)   (450)            
Preferred dividends of subsidiary (1)             (1)       (1)                            
Issuances of stock 77           77         77                            
Repurchases of common stock (15)           (15)         (15)                            
Noncontrolling interests activities: Equity contributions 2                           2 1         1          
Noncontrolling interests activities: Distributions (115)                           (115) (25)         (25)          
Ending balance at Sep. 30, 2017 15,502     0     3,088 10,855     (678) 13,265     2,237 5,503 1,338 4,137 (7) 5,468 35 3,779 22 866 2,912 (21)
Beginning Balance at Jun. 30, 2017 15,605     0     3,046 11,004     (718) 13,332     2,273 5,804 1,338 4,440 (8) 5,770 34 3,772 22 866 2,905 (21)
Net income 102 [2]             57       57     45 (19) [2]   (28)   (28) 9 7 [2]     7  
Comprehensive income (loss) 47                   40 40     7 4     1 1 3          
Share-based compensation expense 21           21         21                            
Preferred stock dividends declared                                           0 [2]     0  
Common stock dividends declared (206)             (206)       (206)       (275)   (275)   (275)            
Issuances of stock 22           22         22                            
Repurchases of common stock (1)           (1)         (1)                            
Noncontrolling interests activities: Equity contributions 1                           1                      
Noncontrolling interests activities: Distributions (89)                           (89) (11)         (11)          
Ending balance at Sep. 30, 2017 15,502     0     3,088 10,855     (678) 13,265     2,237 5,503 1,338 4,137 (7) 5,468 35 3,779 22 866 2,912 (21)
Cumulative-effect adjustment from change in accounting principle (1)             2     (3) (1)                            
Beginning Balance at Dec. 31, 2017 15,140 [3]     0     3,149 10,147     (626) 12,670     2,470 5,626 [3] 1,338 4,268 (8) 5,598 28 3,907 22 866 3,040 (21)
Net income 162             150       150     12 531   521   521 10 245     245  
Comprehensive income (loss) 32                   17 17     15 1     (6) (6) 7 1       1
Share-based compensation expense 50           50         50                            
Preferred stock dividends declared   $ (79) $ (10)           $ (79) $ (10)     $ (79) $ (10)               (1)     (1)  
Common stock dividends declared (724)             (724)       (724)       (250)   (250)   (250)   (50)     (50)  
Preferred dividends of subsidiary (1)             (1)       (1)                            
Issuances of stock 2,302 1,693 566   $ 1,693 $ 566 2,302         2,302 1,693 566                        
Repurchases of common stock (20)           (20)         (20)                            
Noncontrolling interests activities: Equity contributions 3                           3 2         2          
Noncontrolling interests activities: Distributions (104)                           (104) (10)         (10)          
Noncontrolling interests activities: Purchase (1)                           (1)                      
Noncontrolling interests activities: Sale, net of offering costs 90           4         4     86                      
Noncontrolling interests activities: Increase from acquisition 13                           13                      
Ending balance at Sep. 30, 2018 19,111     2,259     5,485 9,485     (612) 16,617     2,494 5,900 1,338 4,539 (14) 5,863 37 4,102 22 866 3,234 (20)
Beginning Balance at Jun. 30, 2018 18,364     1,693     5,279 9,455     (601) 15,826     2,538 5,943 1,338 4,584 (8) 5,914 29 4,166 22 866 3,298 (20)
Net income 334             310       310     24 216   205   205 11 (14)     (14)  
Comprehensive income (loss) (9)                   (11) (11)     2 (4)     (6) (6) 2          
Share-based compensation expense 17           17         17                            
Preferred stock dividends declared   $ (26) (10)           $ (26) $ (10)     $ (26) (10)               0     0  
Common stock dividends declared (244)             (244)       (244)       (250)   (250)   (250)   (50)     (50)  
Issuances of stock 185   $ 566     $ 566 185         185   $ 566                        
Noncontrolling interests activities: Equity contributions 2                           2 1         1          
Noncontrolling interests activities: Distributions (86)                           (86) (6)         (6)          
Noncontrolling interests activities: Sale, net of offering costs 5           4         4     1                      
Noncontrolling interests activities: Increase from acquisition 13                           13                      
Ending balance at Sep. 30, 2018 $ 19,111     $ 2,259     $ 5,485 $ 9,485     $ (612) $ 16,617     $ 2,494 $ 5,900 $ 1,338 $ 4,539 $ (14) $ 5,863 $ 37 $ 4,102 $ 22 $ 866 $ 3,234 $ (20)
[1] As adjusted for the retrospective adoption of ASU 2016-15 and ASU 2016-18, which we discuss in Note 2.
[2] 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.
[3] Derived from audited financial statements.