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Contingencies (Details) - USD ($)
$ in Millions
1 Months Ended
Sep. 26, 2018
Apr. 30, 2019
Sep. 30, 2018
Nov. 30, 2017
Commitments and Contingencies Disclosure [Abstract]        
Gain contingency, unrecorded amount       $ 84.3
Interest rate       9.00%
Litigation settlement cost and expenses       $ 7.2
Litigation settlement, amount awarded from other party $ 141.7      
Proceeds from legal settlements   $ 20.1 $ 35.7