Acquisition - Classification of Transaction Costs (Details) - USD ($) $ in Millions	Jun. 03, 2019	Jun. 30, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Deferred financing costs		$ 10.7	$ 7.2
Rack Holdings Inc.
Business Acquisition [Line Items]
Deferred financing costs	$ 12.6
Transaction costs	25.6
Payment of accrued transaction costs	9.8
Total	48.0
Presented as reduction to debt | Rack Holdings Inc.
Business Acquisition [Line Items]
Deferred financing costs	10.9
Presented as asset | Rack Holdings Inc.
Business Acquisition [Line Items]
Deferred financing costs	$ 1.7