Investments in Real Estate - Acquisitions Allocation (Details) € in Millions, £ in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2023 GBP (£)	Sep. 30, 2023 EUR (€)
Real Estate [Abstract]
Land	$ 727.7	£ 434.7	€ 17.3
Buildings and improvements	2,640.0	824.8	24.2
Lease intangible assets	371.9	122.2	15.6
Other assets	560.3	326.1	1.6
Lease intangible liabilities	(110.2)	(11.0)	(0.8)
Other liabilities	(8.7)	(1.8)	0.0
Net	$ 4,181.0	1,695.0	€ 57.9
Allocated to land, right of use assets under long-term ground leases		£ 3.2
Weighted average amortization period for acquired lease intangible assets	9 years 8 months 12 days	9 years 8 months 12 days	9 years 8 months 12 days
Allocated to other assets, financing receivables with above-market terms		£ 135.3
Allocated to other assets, finance lease right-of-use assets		£ 190.8
Weighted average amortization period for acquired lease intangible liabilities	11 years 1 month 6 days	11 years 1 month 6 days	11 years 1 month 6 days