Summary of Significant Accounting Policies and Procedures (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accounting Policies [Abstract]
Rental revenue reserves (reserve reversals)	$ (0.8)	$ 21.8	$ 15.0	$ 29.3
Straight-line rent reserves (reserve reversals)	(2.3)	2.3	(1.1)	5.1
Total rental revenue reserves (reserve reversals)	$ (3.1)	$ 24.1	$ 13.9	$ 34.4