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Fair Value of Financial Instruments - Schedule of Level 3 Instruments at Fair Value (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Assets
Foreign currency exchange gain	$ (2.8)	$ 2.7	$ (1.7)	$ 0.0
Liabilities
Investment property, net	14,464.7		14,464.7		$ 14,443.6
Transfers Accounted for as Secured Borrowings, Associated Liabilities
Liabilities
Beginning balance	56.1		55.8
Ending balance	54.3		54.3
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Contingent Consideration
Liabilities
Beginning balance	20.2	20.2	20.2	20.2
Ending balance	20.2	20.2	20.2	20.2
Realized losses	0.0	0.0	0.0	0.0
Purchases and issuances	0.0	0.0	0.0	0.0
Other adjustments	0.0	0.0	0.0	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Transfers Accounted for as Secured Borrowings, Associated Liabilities
Liabilities
Realized losses	0.0		1.6
Purchases and issuances	0.4		0.4
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Other Adjustments	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	(2.2)		(3.5)
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net
Assets
Beginning balance	38.3	62.2	19.6	65.9
Foreign currency exchange gain	0.0	0.0	0.0	0.0
Ending balance	54.5	59.5	54.5	59.5
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net | Realized gains / (losses)
Assets
Changes to fair value	(0.4)	(0.1)	(0.4)	(1.8)
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net | Purchases and issuances
Assets
Changes to fair value	18.0	0.1	37.4	0.2
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net | Sales and settlements
Assets
Changes to fair value	(1.2)	(2.7)	(1.9)	(4.8)
Liabilities
Purchases and issuances	0.0	0.0	0.0	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net | Dispositions of properties
Assets
Changes to fair value	(0.2)	0.0	(0.2)	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Notes receivable from real estate developers and operators | Dispositions of properties
Assets
Changes to fair value	0.0	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Collateralized Receivables, net
Assets
Beginning balance	56.5	0.0	56.2	0.0
Foreign currency exchange gain	0.0	0.0	0.0	0.0
Ending balance	54.3	0.0	54.3	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Collateralized Receivables, net | Realized gains / (losses)
Assets
Changes to fair value	0.0	0.0	1.6	(0.4)
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Collateralized Receivables, net | Purchases and issuances
Assets
Changes to fair value	0.0	0.0	0.0	0.4
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Collateralized Receivables, net | Sales and settlements
Assets
Changes to fair value	(2.2)	0.0	(3.5)	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Collateralized Receivables, net | Dispositions of properties
Assets
Changes to fair value	0.0	0.0	0.0	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Notes Receivable from Real Estate Developers and Operators
Assets
Beginning balance	127.7	435.0	134.5	305.2
Foreign currency exchange gain	0.0	8.2	(0.1)	16.7
Ending balance	131.3	462.4	131.3	462.4
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Notes Receivable from Real Estate Developers and Operators | Realized gains / (losses)
Assets
Changes to fair value	0.0	0.0	(0.8)	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Notes Receivable from Real Estate Developers and Operators | Purchases and issuances
Assets
Changes to fair value	4.2	23.1	9.2	147.4
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Notes Receivable from Real Estate Developers and Operators | Sales and settlements
Assets
Changes to fair value	$ (0.6)	$ (3.9)	(11.5)	(6.9)
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Notes Receivable from Real Estate Developers and Operators | Dispositions of properties
Assets
Changes to fair value			$ 0.0	$ 0.0

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