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Commitments and Contingencies (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |  |  |
Loss Contingency, Receivable | $ 14.5 |  | $ 44.0
Loan subject to loss-sharing arrangements, aggregate unpaid principal amount | 12,900.0 |  | 12,200.0
Loan loss accrual | 23.5 |  | $ 22.1
Insurance Claims [Member] |  |  |
Loss Contingency Accrual [Roll Forward] |  |  |
Loss Contingency Accrual | 48.2 | $ 38.1 |
Loss Contingency Accrual, Provision | 0.0 | 0.3 |
Loss Contingency Accrual, Provision Adjustment | (30.2) | (4.8) |
Loss Contingency Accrual, Payments | (0.4) | 0.0 |
Loss Contingency Accrual | $ 17.6 | $ 33.6 |

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- Definition Loan loss accrual + References No definition available. + Details
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- Definition Loan subject to loss-sharing arrangements, aggregate unpaid principal amount + References No definition available. + Details
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- Definition Loss Contingency Accrual, Provision Adjustment + References No definition available. + Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
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- Definition Amount of cash outflow reducing loss contingency liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
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- Definition Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of receivable related to a loss contingency accrual. For example, an insurance recovery receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12053-110248 + Details
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