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STOCKHOLDERS' EQUITY: - Non Controlling Interest (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Non-controlling interest activity        
Balance at the beginning of the period     $ 51.2 $ 47.9
Net earnings $ 3.6 $ 2.1 10.6 4.9
Dividend paid     (4.4) (2.8)
Balance at the end of the period $ 57.4 $ 50.0 $ 57.4 $ 50.0