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Commitments, Guarantees and Contingent Liabilities - Florida Hurricane Catastrophe Fund and California Earthquake Authority (Details) - California Earthquake Authority - USD ($) $ in Millions | Sep. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Loss Contingencies |  |  |
CEA capital balance | $ 5,540.0 |  |
Proceeds of revenue bonds | 682.0 |  |
CEA existing reinsurance layer | 8,150.0 |  |
Current estimated maximum CEA assessment | 1,660.0 |  |
CEA capital balance threshold | 350.0 |  |
CEA capital balance to be restored | 350.0 |  |
Projected aggregate claim paying capacity | $ 16,020.0 |  |
Share of the CEA (as a percent) |  |  | 10.20%
Maximum possible assessment |  | $ 168.8 |

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- Definition The current maximum estimated amount of an assessment if the capital balance of a state insurance facility falls below a specified level. + References No definition available. + Details
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- Definition Represents the maximum possible assessment amount by a state insurance facility in which the entity participates. + References No definition available. + Details
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- Definition Represents the entity's share in a state insurance facility. + References No definition available. + Details
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- Definition Proceeds of Revenue Bonds + References No definition available. + Details
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- Definition Represents the projected aggregate claim paying capacity of a state insurance facility in which the entity participates. + References No definition available. + Details
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- Definition Represents the capital balance of a state insurance facility in which the entity participates. + References No definition available. + Details
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- Definition The capital balance of a state insurance facility, below which an assessment is triggered. + References No definition available. + Details
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- Definition Represents funding obtainable by a state insurance facility from an existing reinsurance layer in the event that losses cause a deficit. + References No definition available. + Details
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- Definition The capital balance level for a state insurance facility that may be restored through assessments. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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