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Municipal Bond Guarantee Insurance (Tables) | 3 Months Ended
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Mar. 31, 2022
Guarantees [Abstract] |
Schedule of Municipal Bond Guarantee Insured Obligations | The following table presents a schedule of BAM’s insured obligations as of March 31, 2022 and December 31, 2021:
|  | March 31, 2022 |  | December 31, 2021
Contracts outstanding |  | 12,611 |  |  | 12,350 |
Remaining weighted average contract period outstanding (in years) |  | 10.8 |  | 10.8
Contractual debt service outstanding (in millions): |  |  |  |
Principal |  | $ | 91,609.8 |  |  | $ | 89,196.5 |
Interest |  | 42,353.7 |  |  | 41,486.5 |
Total debt service outstanding |  | $ | 133,963.5 |  |  | $ | 130,683.0 |
Gross unearned insurance premiums (in millions) |  | $ | 267.3 |  |  | $ | 266.3 |
Financial Guarantee Insurance Contracts, Premium Received over Contract Period | The following table presents a schedule of BAM’s future premium revenues as of March 31, 2022:
Millions |  | March 31, 2022
April 1, 2022 - December 31, 2022 |  | $ | 19.1 |
January 1, 2023 - March 31, 2023 |  | 6.2 |
April 1, 2023 - June 30, 2023 |  | 6.1 |
July 1, 2023 - September 30, 2023 |  | 6.0 |
October 1, 2023 - December 31, 2023 |  | 5.9 |
Total 2023 |  | 24.2 |
2024 |  | 22.7 |
2025 |  | 21.1 |
2026 |  | 19.6 |
2027 |  | 18.1 |
2028 and thereafter |  | 142.5 |
Total gross unearned insurance premiums |  | $ | 267.3 |
Schedule of Net Written Premiums | The following table presents a schedule of written premiums and earned premiums included in White Mountains’s HG Global/BAM segment for the three months ended March 31, 2022 and 2021:
|  |  |  |  |  | Three Months Ended March 31,
Millions |  |  |  |  |  |  |  |  |  | 2022 |  | 2021
Written premiums: |  |  |  |  |  |  |  |  |  |  |  |
Direct |  |  |  |  |  |  |  |  |  | $ | 9.4 |  |  | $ | 8.0 |
Assumed |  |  |  |  |  |  |  |  |  | — |  |  | 4.5 |
Gross written premiums (1) |  |  |  |  |  |  |  |  |  | $ | 9.4 |  |  | $ | 12.5 |
Earned premiums: |  |  |  |  |  |  |  |  |  |  |  |
Direct |  |  |  |  |  |  |  |  |  | $ | 7.6 |  |  | $ | 5.3 |
Assumed |  |  |  |  |  |  |  |  |  | .8 |  |  | 1.1 |
Gross earned premiums (1) |  |  |  |  |  |  |  |  |  | $ | 8.4 |  |  | $ | 6.4 |
(1) There are no ceded premium amounts in the periods presented and gross earned premiums are equivalent to net written premiums and net earned premiums.

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- Definition Tabular disclosure of financial guarantee insurance contracts in which premiums are received over the contract period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6933075&loc=SL5748726-161290 + Details
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- Definition Schedule of Net Written Premiums [Table Text Block] + References No definition available. + Details
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