v3.19.2
Fair Value of Financial Instruments - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis - Additional Information (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Jun. 30, 2018
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]    
MMDA account balances (less than in 2017) $ 68.1 $ 86.8
MMDA Account    
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]    
MMDA account balances (less than in 2017) $ 30.1 $ 28.4