Revenue - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Monthly resident fees	$ 24.2		$ 24.2		$ 38.9
Revenue recognized			59.3	$ 83.7
Facility expense, allowance for credit loss	4.8	$ 3.8	12.4	$ 10.8
Deferred Revenue and Credits
Disaggregation of Revenue [Line Items]
Contract with customer, liability	139.5		139.5		$ 72.5
CARES Act | Accelerated and Advance Payment Program
Disaggregation of Revenue [Line Items]
Amount received from Accelerated and Advance Payment Program	$ 2.5		$ 87.5