Basis of Presentation - Summarizes the Fair Value Hierarchy of Financial Assets and Liabilities (Details) - Recurring [Member] $ in Millions	Jun. 30, 2020 USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Restricted amounts held in escrow-current	$ 56.0
Total assets at fair value	56.0
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Restricted amounts held in escrow-current	56.0
Total assets at fair value	$ 56.0