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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 year at Dec. 31, 2019 | $ 8.8 | $ 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 |  |  |  |  |  | 474.3 |  |  | 2.8 | 474.3
Dividends declared and paid, common stock, per share, 2021- '$1.30, 2020- '$0.60 |  |  |  |  |  | (463.8) |  |  | (2.6) |
Other activity, including dividend, interest and foreign currency transaction effect |  |  |  | 7.4 |  |  |  |  |  |
Other activity of the period |  | (6.7) |  |  |  |  |  |  |  |
Balance at end of year at Jun. 30, 2020 |  | 3,418.2 | (2,767.9) | (273.6) | $ (3,041.5) | 6,446.1 | (10.1) | 6,821.5 | 48.1 | 6,869.6
Balance at beginning of year at Mar. 31, 2020 | 8.8 | 3,410.5 | (2,767.9) | (266.3) |  | 6,341.2 |  | 6,716.2 | 47.0 | 6,763.2
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Net earnings |  |  |  |  |  | 259.5 |  |  | 1.4 | 259.5
Dividends declared and paid, common stock, per share, 2021- '$1.30, 2020- '$0.60 |  |  |  |  |  | (154.6) |  |  | (0.3) |
Other activity, including dividend, interest and foreign currency transaction effect |  |  |  | (7.3) |  |  |  |  |  |
Other activity of the period |  | 7.7 |  |  |  |  |  |  |  |
Balance at end of year at Jun. 30, 2020 |  | 3,418.2 | (2,767.9) | (273.6) | (3,041.5) | 6,446.1 | (10.1) | 6,821.5 | 48.1 | 6,869.6
Balance at beginning of year at Dec. 31, 2020 | 8.8 | 3,441.5 | (2,767.5) | (296.0) |  | 6,846.4 | (8.4) | 7,224.8 | 51.2 | 7,276.0
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Net earnings |  |  |  |  |  | 1,696.6 |  |  | 7.0 | 1,696.6
Dividends declared and paid, common stock, per share, 2021- '$1.30, 2020- '$0.60 |  |  |  |  |  | (1,005.0) |  |  | (2.9) |
Used for corporate purposes |  |  | 0.1 |  |  |  |  |  |  | 0.1
Other activity, including dividend, interest and foreign currency transaction effect |  |  |  | (12.4) |  |  |  |  |  |
Other activity of the period |  | 13.4 |  |  |  |  |  |  |  |
Balance at end of year at Jun. 30, 2021 |  | 3,454.9 | (2,767.4) | (308.4) | (3,075.8) | 7,538.0 | (8.4) | 7,917.5 | 55.3 | 7,972.8
Balance at beginning of year at Mar. 31, 2021 | $ 8.8 | 3,439.5 | (2,767.5) | (293.7) |  | 7,146.4 |  | 7,525.1 | 53.2 | 7,578.3
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Net earnings |  |  |  |  |  | 932.7 |  |  | 3.7 | 932.7
Dividends declared and paid, common stock, per share, 2021- '$1.30, 2020- '$0.60 |  |  |  |  |  | (541.1) |  |  | (1.6) |
Used for corporate purposes |  |  |  |  |  |  |  |  |  | 0.1
Other activity, including dividend, interest and foreign currency transaction effect |  |  |  | (14.7) |  |  |  |  |  |
Other activity of the period |  | 15.4 |  |  |  |  |  |  |  |
Balance at end of year at Jun. 30, 2021 |  | $ 3,454.9 | $ (2,767.4) | $ (308.4) | $ (3,075.8) | $ 7,538.0 | $ (8.4) | $ 7,917.5 | $ 55.3 | $ 7,972.8

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