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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions | CAPITAL STOCK: | ADDITIONAL PAID-IN CAPITAL: | TREASURY STOCK: Southern Copper common shares | TREASURY STOCK: Parent Company (Grupo Mexico) common shares | TREASURY STOCK: | RETAINED EARNINGS: | ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS): | STOCKHOLDERS' EQUITY | NON-CONTROLLING INTEREST | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at beginning of period at Dec. 31, 2018 |  | $ 3,393.7 | $ (2,768.3) | $ (251.3) |  | $ 6,186.9 | $ (2.4) | $ 6,567.4 | $ 45.4 | $ 6,612.8
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Net earnings |  |  |  |  |  | 388.2 |  |  | 1.0 | 388.2
Dividends/distributions declared and paid |  |  |  |  |  | (309.2) |  |  | (0.1) |
SCC shareholder derivative lawsuit - received from AMC |  |  |  |  |  | 36.5 |  |  |  | (36.5)
SCC shareholder derivative lawsuit - dividend paid |  |  |  |  |  | (36.5) |  |  |  | 36.5
Other activity, including dividend, interest and foreign currency transaction effect |  |  |  | (6.4) |  |  |  |  |  |
Other activity of the period |  | 6.7 |  |  |  | (0.2) |  |  |  |
Balance at end of period at Mar. 31, 2019 | $ 8.8 | 3,400.4 |  | (257.7) | $ (3,026.0) | 6,265.7 |  | 6,646.5 | 46.3 | 6,692.8
Balance at beginning of period at Dec. 31, 2019 |  | 3,424.9 | $ (2,767.9) | (281.0) |  | 6,435.6 | $ (10.1) | 6,810.3 | 47.9 | 6,858.2
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Net earnings |  |  |  |  |  | 214.8 |  |  | 1.4 | 214.8
Dividends/distributions declared and paid |  |  |  |  |  | (309.2) |  |  | (2.3) |
Other activity, including dividend, interest and foreign currency transaction effect |  |  |  | 14.7 |  |  |  |  |  |
Other activity of the period |  | (14.4) |  |  |  |  |  |  |  |
Balance at end of period at Mar. 31, 2020 | $ 8.8 | $ 3,410.5 |  | $ (266.3) | $ (3,034.2) | $ 6,341.2 |  | $ 6,716.2 | $ 47.0 | $ 6,763.2

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