Investments in Real Estate - Acquisitions Allocation (Details) € in Millions, £ in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2023 GBP (£)	Jun. 30, 2023 EUR (€)
Acquisitions
Weighted average amortization period for acquired lease intangible assets	11 years 7 months 6 days	11 years 7 months 6 days	11 years 7 months 6 days
Weighted average amortization period for acquired lease intangible liabilities	16 years 9 months 18 days	16 years 9 months 18 days	16 years 9 months 18 days
Real Estate Investment
Acquisitions
Land	$ 665.4	£ 141.0	€ 15.2
Buildings and improvements	2,259.3	318.8	22.1
Lease intangible assets	328.6	76.3	14.4
Other assets	620.9	59.7	0.0
Lease intangible liabilities	(99.4)	(6.8)	(0.9)
Other liabilities	(57.0)	(0.1)	0.0
Net	$ 3,717.8	588.9	€ 50.8
Allocated to land, right of use assets under long-term ground leases		7.6
Allocated to other assets, financing receivables with above-market terms		11.1
Allocated to other assets, finance lease right-of-use assets		£ 48.6