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STOCKHOLDERS' EQUITY: - Non Controlling Interest (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Non-controlling interest activity    
Balance at the beginning of the period $ 45.4 $ 41.7
Net earnings 1.0 1.2
Dividend paid (0.1) (0.3)
Balance at the end of the period $ 46.3 $ 42.6