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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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