Acquisitions - Classification of Transaction Costs (Details) - USD ($) $ in Millions		5 Months Ended	7 Months Ended	12 Months Ended
	Jun. 03, 2019	Jun. 02, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Deferred financing costs			$ 7.8	$ 7.2
IPO costs		$ 0.0	$ 11.3	$ 0.0	$ 0.0
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
IPO costs	11.0
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