Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Other Assets [Abstract]
Straight line rent receivable	$ 39.1	$ 44.3
Goodwill	23.9	23.9
Prepaid expenses	13.8	13.3
Other	13.2	13.0
Leasing commissions, net of accumulated amortization of $10.1 and $9.7 at September 30, 2022 and December 31, 2021, respectively	8.1	8.0
Right of use asset, net	8.0	10.0
Deferred taxes, net	6.9	12.6
Other Assets	275.4	177.9
Accumulated amortization, leasing commissions	10.1	9.7
Hedge Assets
Other Assets [Abstract]
Hedge assets	85.0	24.5
Interest Rate Cap And Swaps
Other Assets [Abstract]
Hedge assets	59.3	2.3
Above Market Leases
Other Assets [Abstract]
Above-market leases, net of accumulated amortization of $49.3 and $60.4 at September 30, 2022 and December 31, 2021, respectively	4.2	8.4
Accumulated amortization, above-market leases	49.3	60.4
Furniture and Equipment
Other Assets [Abstract]
Furniture and equipment net of accumulated depreciation of $26.8 and $27.4 at September 30, 2022 and December 31, 2021, respectively	13.9	17.6
Accumulated amortization, office furniture and equipment	$ 26.8	$ 27.4