Investments in Real Estate - Allocation of Acquisitions (Details) € in Millions, £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2023 GBP (£)	Dec. 31, 2023 EUR (€)
Real Estate [Abstract]
Land	$ 779.5	£ 477.2	€ 288.6
Buildings and improvements	2,842.5	909.0	462.3
Lease intangible assets	430.0	130.1	36.8
Other assets	559.9	257.3	35.2
Lease intangible liabilities	(115.1)	(12.4)	(0.9)
Other liabilities	(9.1)	(2.6)	(9.6)
Net	$ 4,487.7	1,758.6	€ 812.4
Allocated to land, right of use assets under long-term ground leases | £		£ 7.1
Weighted average amortization period for acquired lease intangible assets	11 years 3 months 18 days	11 years 3 months 18 days	11 years 3 months 18 days
Allocated to other assets, financing receivables with above-market terms		£ 66.1	€ 17.4
Allocated to other assets, finance lease right-of-use assets		£ 191.1	10.6
Allocated to other assets, ground leases			€ 7.2
Weighted average amortization period for acquired lease intangible liabilities	16 years 10 months 24 days	16 years 10 months 24 days	16 years 10 months 24 days
Deferred rent on below market leases		£ 2.3	€ 2.1
Allocated to other liabilities, lease liabilities under operating leases		£ 0.2	1.6
Lease liabilities under finance leases			4.4
Lease liabilities, other liabilities			€ 1.5