Schedule III - Real Estate and Accumulated Depreciation - Changes in Accumulated Depreciation Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at the beginning of period	$ 406.5	$ 344.0	$ 230.3
Additions during the period:
Depreciation expense	110.2	110.8	128.2
Deductions during the period:
Dispositions	(49.0)	(36.0)	(34.8)
Foreign currency	(0.9)	(12.3)	20.3
Balance at close of period	$ 466.8	$ 406.5	$ 344.0