Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Total Fair Value
Recurring fair value measurements
Cash and cash equivalents	$ 31.0	$ 12.5
Interest rate caps - liability position	(3.6)	(4.1)
Total recurring fair value measurements	27.4	8.4
Total Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Recurring fair value measurements
Cash and cash equivalents	31.0	12.5
Interest rate caps - liability position	0.0	0.0
Total recurring fair value measurements	31.0	12.5
Total Fair Value | Significant Other Observable Inputs (Level 2)
Recurring fair value measurements
Cash and cash equivalents	0.0	0.0
Interest rate caps - liability position	(3.6)	(4.1)
Total recurring fair value measurements	(3.6)	(4.1)
Carrying Value
Recurring fair value measurements
Cash and cash equivalents	31.0	12.5
Interest rate caps - liability position	(3.6)	(4.1)
Total recurring fair value measurements	$ 27.4	$ 8.4