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Schedule I- Investments | 12 Months Ended
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Dec. 31, 2020
Summary of Investments, Other than Investments in Related Parties [Abstract] |
Schedule I - Summary Of Investments, Other Than Investments In Related Parties | SCHEDULE I MBIA INC. AND SUBSIDIARIES SUMMARY OF INVESTMENTS, OTHER THAN INVESTMENTS IN RELATED PARTIES December 31, 2020 (In millions)
|  | December 31, 2020 |
Type of investment |  | Cost |  |  | Fair Value |  |  | Amount at which shown in the balance sheet |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and government agency |  | $ | 556 |  |  | $ | 631 |  |  | $ | 631 |
State and municipal bonds |  |  | 162 |  |  |  | 194 |  |  |  | 194 |
Foreign governments |  |  | 9 |  |  |  | 10 |  |  |  | 10 |
Corporate obligations |  |  | 767 |  |  |  | 830 |  |  |  | 830 |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage-backed agency |  |  | 305 |  |  |  | 312 |  |  |  | 312 |
Residential mortgage-backed non-agency |  |  | 23 |  |  |  | 25 |  |  |  | 25 |
Commercial mortgage-backed |  |  | 17 |  |  |  | 17 |  |  |  | 17 |
Asset-backed securities: |  |  |  |  |  |  |  |  |  |  |  |
Collateralized debt obligations |  |  | 120 |  |  |  | 118 |  |  |  | 118 |
Other asset-backed |  |  | 121 |  |  |  | 121 |  |  |  | 121 |
Total long-term available-for-sale |  |  | 2,080 |  |  |  | 2,258 |  |  |  | 2,258 |
Short-term available-for-sale |  |  | 280 |  |  |  | 281 |  |  |  | 281 |
Total available-for-sale |  |  | 2,360 |  |  |  | 2,539 |  |  |  | 2,539 |
Investments at fair value |  |  | 189 |  |  |  | 197 |  |  |  | 197 |
Total investments |  | $ | 2,549 |  |  | $ | 2,736 |  |  | $ | 2,736 |
Assets of consolidated variable interest entities: |  |  |  |  |  |  |  |  |  |  |  |
Investments at fair value |  |  | 96 |  |  |  | 77 |  |  |  | 77 |
Loans receivable |  |  | 124 |  |  |  | 120 |  |  |  | 120 |
Total investments of consolidated variable interest entities |  | $ | 220 |  |  | $ | 197 |  |  | $ | 197 |

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- Definition The entire disclosure of information about investment held by insurance company, excluding investment in related party. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 15 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 7 -Subparagraph (SX 210.12-15) -URI http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010 + Details
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