| Item | Type | Period | Balance | Description | | Financial Guarantee Insurance Contracts, Premium Received over Contract Period | text | | | Tabular disclosure of financial guarantee insurance contracts in which premiums are received over the contract period. |
| Financial Guarantee Insurance Contracts, Claim Liability | text | | | Tabular disclosure of the claim liability for financial guarantee insurance contracts. |
| Schedule of Insured Financial Obligations with Credit Deterioration | text | | | Tabular disclosure of insured financial obligations with credit deterioration related to the claim liability on financial guarantee insurance contracts as of the end of each annual and interim reporting period detailing, at a minimum, the following for each surveillance category or grouping used to track and monitor the entity's insured financial obligations: (1) number of issued and outstanding financial guarantee insurance contracts; (2) remaining weighted average contract period; (3) insured contractual payments outstanding, segregating principal and interest; (4) gross claim liability; (5) gross potential recoveries; (6) net discount of both the claim liability and potential recoveries; (7) net claim liability; (8) reinsurance recoverable; and (9) unearned premium revenue. |
| Financial Guarantee Insurance Contracts, Premium Received over Contract Period | text | | | Disclosure of information about financial guarantee insurance contracts in which premiums are received over the contract period. |
| Financial Guarantee Insurance Contracts, Claim Liability | text | | | Disclosure of information about the claim liability for financial guarantee insurance contracts. |
| Schedule of Insured Financial Obligations with Credit Deterioration | text | | | This element represents the schedule of insured financial obligations with credit deterioration related to the claim liability on financial guarantee insurance contracts as of the end of each annual and interim reporting period detailing, at a minimum, the following for each surveillance category or grouping used to track and monitor the entity's insured financial obligations: (1) number of issued and outstanding financial guarantee insurance contracts; (2) remaining weighted average contract period; (3) insured contractual payments outstanding, segregating principal and interest; (4) gross claim liability; (5) gross potential recoveries; (6) net discount of both the claim liability and potential recoveries; (7) net claim liability; (8) reinsurance recoverable; and (9) unearned premium revenue. |
| Income Statement Location | text | | | Information by location in the income statement. |
| Financial Guarantee Insurance Contracts, Premium Received over Contract Period | text | | | 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. |
| Financial Guarantee Insurance Contracts, Claim Liability | text | | | 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. |
| Income Statement Location | text | | | Information by location in the income statement. |
| Credit Deterioration Surveillance Category | text | | | Information by category used by management to monitor and track credit deterioration of an insured party's obligations on the underlying contracts (such as debt agreements). |
| Schedule of Insured Financial Obligations with Credit Deterioration | text | | | 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. |
| Income Statement Location | | duration | | Location in the income statement. |
| Financial Guarantee Insurance Contracts, Accelerated Premium Revenue, Amount | text | | | |
| Financial Guarantee Insurance Contracts, Premium Receivable | text | | | A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. |
| Financial Guarantee Insurance Contracts, Premium Receivable, Premium Expected to be Collected | text | | | |
| Financial Guarantee Insurance Contracts, Premium Received over Contract Period, Premium Receivable, Weighted Average Risk Free Discount Rate | % | duration | | This element represents the weighted average risk free rate used to discount the premiums expected to be collected for financial guarantee insurance contracts where the premium is to be received over the contract period. |
| Financial Guarantee Insurance Contracts, Premium Received over Contract Period, Premium Receivable, Weighted Average Collection Period | | duration | | Weighted average period over which premium receivable for financial guarantee insurance contracts is collected where premium is received over the contract period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. |
| Financial Guarantee Insurance Contracts, Premium Received over Contract Period, Premium Receivable | $ | instant | debit | Amount of premium receivable in the statement of financial position for financial guarantee insurance contracts where the premium is received over the contract period. |
| Financial Guarantee Insurance Contracts, Premium Received over Contract Period, Unearned Premium Revenue | $ | instant | credit | Amount of unearned premium revenue in the statement of financial position for financial guarantee insurance contracts where the premium is received over the contract period. |
| Financial Guarantee Insurance Contracts, Premium Received over Contract Period, Premium Receivable, Accretion | $ | duration | credit | The amount of accretion on premium receivable in the statement of income for financial guarantee insurance contracts where premium is received over the contract period. |
| Financial Guarantee Insurance Contracts, Unearned Premium Revenue, Fiscal Year Maturity | text | | | |
| Financial Guarantee Insurance Contract, Premium Revenue to be Recognized, Remainder of Fiscal Year | $ | instant | credit | Amount of premium revenue under financial guarantee insurance contract to be recognized in remainder of current fiscal year. |
| Financial Guarantee Insurance Contracts, Claim Liability, Weighted Average Risk Free Discount Rate | % | duration | | This element represents the weighted average risk free rate used to discount the claim liability related to financial guarantee insurance contracts. |
| Financial Guarantee Insurance Contracts, Claim Liability, Significant Components of Change, Effect of Change in Discount Rate | $ | duration | debit | This element represents the amount of change in the claim liability related to financial guarantee insurance contracts arising from a change in the rate used to discount the claim liability. |
| Financial Guarantee Insurance Contracts, Claim Liability, Significant Components of Change, Accretion of Discount | $ | duration | credit | This element represents the amount of the change in the claim liability related to financial guarantee insurance contracts arising from the accretion of the discount of the claim liability. |
| Financial Guarantee Insurance Contracts, Claim Liability, Significant Components of Change, Timing | $ | duration | debit | This element represents the amount of the change in the claim liability related to financial guarantee insurance contracts arising from a change in the timing of the claim liability. |
| Financial Guarantee Insurance Contracts, Claim Liability, Significant Components of Change, Likelihood of Default | $ | duration | debit | This element represents the amount of the change in the claim liability related to financial guarantee insurance contracts arising from a change in the likelihood of default by the insured party. |
| Financial Guarantee Insurance Contracts, Risk Management Activities | text | | | |
| Surveillance Category | | duration | | This element is meant to provide the categories used by an entity for the tracking and monitoring of potential deterioration in the credit worthiness of insured or guaranteed parties. |
| Schedule of Insured Financial Obligations with Credit Deterioration, Number of Contracts Issued and Outstanding | | instant | | This element represents the number of issued and outstanding contracts for each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. |
| Insured Financial Obligations with Credit Deterioration, Remaining Weighted Average Contract Period | | duration | | Remaining weighted average contract period of financial guarantee insurance contracts, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. |
| Schedule of Insured Financial Obligations with Credit Deterioration, Insured Contractual Payments Outstanding | text | | | |
| Schedule of Insured Financial Obligations with Credit Deterioration, Net Claim Liability | text | | | |
| Schedule of Insured Financial Obligations with Credit Deterioration, Statement of Financial Position, Unearned Premium Revenue | $ | instant | credit | This element represents the amount of unearned premium revenue, reported on or included in the statement of financial position, related to financial guarantee insurance contracts and presented in the schedule of insured financial obligations with credit deterioration in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. |
| Schedule of Insured Financial Obligations with Credit Deterioration, Statement of Financial Position, Claim Liability | $ | instant | credit | This element represents the claim liability, reported on or included in the statement of financial position, related to financial guarantee insurance contracts and presented in the schedule of insured financial obligations with credit deterioration in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. |
| Schedule of Insured Financial Obligations with Credit Deterioration, Statement of Financial Position, Reinsurance Recoverable | $ | instant | debit | This element represents the amount of reinsurance recoverable, reported on or included in the statement of financial position, related to financial guarantee insurance contracts and presented in the schedule of insured financial obligations with credit deterioration in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. |