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Commitments and Contingencies (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Loss Contingencies [Line Items] |  |
Funded loans unpaid principal | $ 42,100.0 |
Letters of credit outstanding | 253.7 |
Accrued loan loss | 60.7 | $ 67.4
Assets available for recourse | 622.9 |
Guarantees total | 205.5 |
Recognized revenue included in contract liability | (131.8) |
Contingent deferred consideration | $ 271.1 | 266.1
Maximum future commitments equity in real estate investment, percent | 2.00% |
Commitments to investment in future real estate investment | $ 175.7 |
Commitments to investment in future real estate investment | 0.50 |
Commitment to investment in consolidated projects | $ 190.3 |
Commitments to investment in unconsolidated real estate subsidiary | 54.3 |
Performance Guarantee |  |
Loss Contingencies [Line Items] |  |
Loss contingency, estimate of possible loss | 462.2 | 241.8
Other Current Liabilities |  |
Loss Contingencies [Line Items] |  |
Recognized revenue included in contract liability | 265.0 | 264.1
Warehouse Receivable |  |
Loss Contingencies [Line Items] |  |
Warehouse receivables | 226.5 |
Funded Loan Subject to Loss Sharing Arrangements |  |
Loss Contingencies [Line Items] |  |
Funded loans unpaid principal | 38,700.0 |
Letters of credit outstanding | 150.0 | 140.0
SBL Program |  |
Loss Contingencies [Line Items] |  |
Letters of credit outstanding | $ 5.0 | $ 5.0
Percentage of maximum original principal amount loan loss | 10.00% |
Funded Loan Not Subject to Loss Sharing Arrangements |  |
Loss Contingencies [Line Items] |  |
Letters of credit outstanding | $ 155.0 |

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