Commitments and Contingencies (Details) - USD ($) $ in Millions	1 Months Ended	21 Months Ended
	Aug. 31, 2015	Dec. 31, 2019	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Build-to-Suit Lease
Operating Leased Assets [Line Items]
Term of leasing contract	15 years
Other long term liabilities | Build-to-Suit Lease
Operating Leased Assets [Line Items]
Financing obligation			$ 23.5	$ 24.3	$ 23.9
Other current liabilities | Build-to-Suit Lease
Operating Leased Assets [Line Items]
Financing obligation			1.4	$ 1.4	$ 0.8
Capital Addition Purchase Commitments
Operating Leased Assets [Line Items]
Amount prepaid under long-term commitment obligation			$ 12.9
Capital Addition Purchase Commitments | Scenario, Forecast
Operating Leased Assets [Line Items]
Amount remaining under long-term commitment obligation		$ 129.2