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Discontinued Operations - Cash Flows Related to Discontinued Operations (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Net cash provided by (used in):    
Operating activities $ 3.4 $ 18.3
Investing activities (0.3) (0.4)
Net cash provided by discontinued operations $ 3.1 $ 17.9