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CONSOLIDATED STATEMENT OF CASH FLOWS (Parenthetical) - USD ($)
$ in Millions
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2018
Restricted Cash, Asset, Statement of Financial Position [Extensible List]     Other Assets, Current
Other Assets      
Restricted Cash $ 0.0 $ 0.0 $ 179.3