Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2020
Income Tax Contingency [Line Items]
Income tax expense (benefit)	$ (15.9)	$ (3.6)	$ (20.7)	$ (1.0)
Approximate rate on pre-tax income	12.10%	109.10%
State Tax Authority [Member] | Earliest Tax Year [Member] | State of New Jersey [Member]
Income Tax Contingency [Line Items]
Tax year being audited in income tax examination			2013
State Tax Authority [Member] | Earliest Tax Year [Member] | State of New York [Member]
Income Tax Contingency [Line Items]
Tax year being audited in income tax examination			2014
State Tax Authority [Member] | Earliest Tax Year [Member] | State of Massachusetts [Member]
Income Tax Contingency [Line Items]
Tax year being audited in income tax examination			2014
State Tax Authority [Member] | Latest Tax Year [Member] | State of New Jersey [Member]
Income Tax Contingency [Line Items]
Tax year being audited in income tax examination			2017
State Tax Authority [Member] | Latest Tax Year [Member] | State of New York [Member]
Income Tax Contingency [Line Items]
Tax year being audited in income tax examination			2016
State Tax Authority [Member] | Latest Tax Year [Member] | State of Massachusetts [Member]
Income Tax Contingency [Line Items]
Tax year being audited in income tax examination			2016
Foreign Tax Authority [Member] | Earliest Tax Year [Member] | Federal Ministry of Finance, Germany [Member]
Income Tax Contingency [Line Items]
Tax year being audited in income tax examination			2013
Foreign Tax Authority [Member] | Earliest Tax Year [Member] | Switzerland Federal Tax Administration [Member]
Income Tax Contingency [Line Items]
Tax year being audited in income tax examination			2015
Foreign Tax Authority [Member] | Latest Tax Year [Member] | Federal Ministry of Finance, Germany [Member]
Income Tax Contingency [Line Items]
Tax year being audited in income tax examination			2015
Foreign Tax Authority [Member] | Latest Tax Year [Member] | Switzerland Federal Tax Administration [Member]
Income Tax Contingency [Line Items]
Tax year being audited in income tax examination			2016
Scenario Forecast [Member]
Income Tax Contingency [Line Items]
U.S. federal statutory rate					21.00%