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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] | 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]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Cumulative-effect adjustment from change in accounting principle | $ (1) |  |  |  |  |  |  | $ 2 |  |  | $ (3) | $ (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2017 | 15,140 |  |  |  | $ 0 |  | $ 3,149 | 10,147 |  |  | (626) | 12,670 |  |  | $ 2,470 | $ 5,626 |  | $ 1,338 | $ 4,268 | $ (8) | $ 5,598 | $ 28 | $ 3,907 | $ 22 | $ 866 | $ 3,040 | $ (21)
Net income (loss) | 358 |  |  |  |  |  |  | 375 |  |  |  | 375 |  |  | (17) | 169 |  |  | 170 |  | 170 | (1) | 225 |  |  | 225 |
Other comprehensive (loss) income | 99 |  |  |  |  |  |  |  |  |  | 84 | 84 |  |  | 15 | 4 |  |  |  |  |  | 4 |  |  |  |  |
Share-based compensation expense | 15 |  |  |  |  |  | 15 |  |  |  |  | 15 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividends declared |  |  | $ (28) |  |  |  |  |  | $ (28) |  |  |  | $ (28) |  |  |  |  |  |  |  |  |  | 0 |  |  | 0 |
Common stock dividends declared | (236) |  |  |  |  |  |  | (236) |  |  |  | (236) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuances of stock | 1,291 |  | 1,693 |  |  | $ 1,693 | 1,291 |  |  |  |  | 1,291 | 1,693 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchases of common stock | (19) |  |  |  |  |  | (19) |  |  |  |  | (19) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interests activities: Distributions | (7) |  |  |  |  |  |  |  |  |  |  |  |  |  | (7) | (1) |  |  |  |  |  | (1) |  |  |  |  |
Ending balance at Mar. 31, 2018 | 18,305 |  |  |  | 1,693 |  | 4,436 | 10,260 |  |  | (545) | 15,844 |  |  | 2,461 | 5,798 |  | 1,338 | 4,438 | (8) | 5,768 | 30 | 4,132 | 22 | 866 | 3,265 | (21)
Cumulative-effect adjustment from change in accounting principle | 15 |  |  |  |  |  |  | 57 |  |  | (42) | 15 |  |  |  | 0 |  |  | 2 | (2) | 0 |  | (2) |  |  | 2 | (4)
Beginning Balance at Dec. 31, 2018 | 19,248 | [1] |  |  | 2,258 |  | 5,540 | 10,104 |  |  | (764) | 17,138 |  |  | 2,110 | 6,115 | [1] | 1,338 | 4,687 | (10) | 6,015 | 100 | 4,258 | 22 | 866 | 3,390 | (20)
Net income (loss) | 518 |  |  |  |  |  |  | 477 |  |  |  | 477 |  |  | 41 | 177 |  |  | 176 |  | 176 | 1 | 264 |  |  | 264 |
Other comprehensive (loss) income | (11) |  |  |  |  |  |  |  |  |  | (11) | (11) |  |  |  | 1 |  |  |  |  |  | 1 |  |  |  |  |
Share-based compensation expense | 21 |  |  |  |  |  | 21 |  |  |  |  | 21 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividends declared |  |  | $ (26) | $ (10) |  |  |  |  | $ (26) | $ (10) |  |  | $ (26) | $ (10) |  |  |  |  |  |  |  |  | 0 |  |  | 0 |
Common stock dividends declared | (265) |  |  |  |  |  |  | (265) |  |  |  | (265) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuances of stock | 24 |  |  |  |  |  | 24 |  |  |  |  | 24 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchases of common stock | (14) |  |  |  |  |  | (14) |  |  |  |  | (14) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interests activities: Distributions | (4) |  |  |  |  |  |  |  |  |  |  |  |  |  | (4) |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interests activities: Purchase | (26) |  |  |  |  |  | (3) |  |  |  |  | (3) |  |  | (23) |  |  |  |  |  |  |  |  |  |  |  |
Ending balance at Mar. 31, 2019 | $ 19,470 |  |  |  | $ 2,258 |  | $ 5,568 | $ 10,337 |  |  | $ (817) | $ 17,346 |  |  | $ 2,124 | $ 6,293 |  | $ 1,338 | $ 4,865 | $ (12) | $ 6,191 | $ 102 | $ 4,520 | $ 22 | $ 866 | $ 3,656 | $ (24)
[1] | Derived from audited financial statements.

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