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CONDENSED 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, 2017 |  | $ 3,373.3 | $ (2,768.7) | $ (232.4) |  | $ 5,726.2 | $ 0.5 | $ 6,107.7 | $ 41.7 | $ 6,149.4
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Net earnings |  |  |  |  |  | 1,249.8 |  |  | 3.9 | 1,249.8
Dividends/distributions declared and paid |  |  |  |  |  | (773.0) |  |  | (1.2) |
Used for corporate purposes |  |  | 0.4 |  |  |  |  |  |  |
Other activity, including dividend, interest and foreign currency transaction effect |  |  |  | (17.3) |  |  |  |  |  |
Other activity of the period |  | 18.5 |  |  |  |  |  |  |  |
Balance at end of period at Sep. 30, 2018 | $ 8.8 | 3,391.8 | (2,768.3) | (249.7) | $ (3,018.0) | 6,203.0 |  | 6,586.1 | 44.4 | 6,630.5
Balance at beginning of period at Jun. 30, 2018 |  | 3,382.7 | (2,768.3) | (240.8) |  | 6,142.8 | 0.5 | 6,525.7 | 43.4 | 6,569.1
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Net earnings |  |  |  |  |  | 369.4 |  |  | 1.3 | 369.4
Dividends/distributions declared and paid |  |  |  |  |  | (309.2) |  |  | (0.3) |
Other activity, including dividend, interest and foreign currency transaction effect |  |  |  | (8.9) |  |  |  |  |  |
Other activity of the period |  | 9.1 |  |  |  |  |  |  |  |
Balance at end of period at Sep. 30, 2018 | 8.8 | 3,391.8 | (2,768.3) | (249.7) | (3,018.0) | 6,203.0 |  | 6,586.1 | 44.4 | 6,630.5
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 |  |  |  |  |  | 1,180.2 |  |  | 4.7 | 1,180.2
Dividends/distributions declared and paid |  |  |  |  |  | (927.7) |  |  | (1.1) |
SCC shareholder derivative lawsuit - received from AMC |  |  |  |  |  | 36.5 |  |  |  |
SCC shareholder derivative lawsuit - dividend paid |  |  |  |  |  | (36.5) |  |  |  |
Used for corporate purposes |  |  | 0.4 |  |  |  |  |  |  |
Other activity, including dividend, interest and foreign currency transaction effect |  |  |  | (20.7) |  |  |  |  |  |
Other activity of the period |  | 21.9 |  |  |  | (0.2) |  |  |  |
Balance at end of period at Sep. 30, 2019 | 8.8 | 3,415.6 | (2,767.9) | (272.0) | (3,039.9) | 6,439.2 |  | 6,821.3 | 49.0 | 6,870.3
Balance at beginning of period at Jun. 30, 2019 |  | 3,407.6 | (2,767.9) | (264.5) |  | 6,358.7 | $ (2.4) | 6,740.3 | 48.3 | 6,788.6
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Net earnings |  |  |  |  |  | 389.6 |  |  | 1.7 | 389.6
Dividends/distributions declared and paid |  |  |  |  |  | (309.2) |  |  | (1.0) |
Other activity, including dividend, interest and foreign currency transaction effect |  |  |  | (7.5) |  |  |  |  |  |
Other activity of the period |  | 8.0 |  |  |  | 0.1 |  |  |  |
Balance at end of period at Sep. 30, 2019 | $ 8.8 | $ 3,415.6 | $ (2,767.9) | $ (272.0) | $ (3,039.9) | $ 6,439.2 |  | $ 6,821.3 | $ 49.0 | $ 6,870.3

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