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Insurance In Force (Schedule Of Insurance In Force By Type Of Bond, Excluding Transactions Guaranteed By MBIA Corp. On Behalf Of Various Investment Management Services And Other Affiliated Companies) (Detail) - USD ($) $ in Billions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Insurance in Force |  | $ 91.4 | $ 107.5
Gross Par Amount |  | 49.6 | 58.9
U S [Member] |  |  |
Insurance in Force |  | 84.5 | 99.4
Non-United States [Member] |  |  |
Insurance in Force |  | 6.9 | 8.1
Global Public Finance [Member] |  |  |
Insurance in Force |  | 87.4 | 100.7
Gross Par Amount |  | 46.7 | 54.6
Global Public Finance [Member] | U S [Member] |  |  |
Insurance in Force |  | 81.5 | 93.7
Gross Par Amount |  | 41.9 | 48.9
Global Public Finance [Member] | Non-United States [Member] |  |  |
Insurance in Force |  | 5.9 | 7.0
Gross Par Amount |  | 4.8 | 5.7
Global Structured Finance [Member] |  |  |
Insurance in Force |  | 4.0 | 6.8
Gross Par Amount |  | 2.9 | 4.3
General Obligation [Member] | Global Public Finance [Member] | U S [Member] |  |  |
Insurance in Force | [1] | 25.0 | 29.1
Gross Par Amount | [1] | 12.1 | 14.3
General Obligation - Lease [Member] | Global Public Finance [Member] | U S [Member] |  |  |
Insurance in Force |  | 2.4 | 3.1
Gross Par Amount |  | 1.9 | 2.3
Municipal Utilities [Member] | Global Public Finance [Member] | U S [Member] |  |  |
Insurance in Force |  | 10.6 | 12.0
Gross Par Amount |  | 7.3 | 8.1
Tax-Backed [Member] | Global Public Finance [Member] | U S [Member] |  |  |
Insurance in Force |  | 15.7 | 17.7
Gross Par Amount |  | 7.9 | 9.2
Transportation [Member] | Non-United States [Member] |  |  |
Insurance in Force |  | 2.1 | 2.7
Gross Par Amount |  | 1.8 | 2.3
Transportation [Member] | Global Public Finance [Member] | U S [Member] |  |  |
Insurance in Force |  | 9.2 | 10.6
Gross Par Amount |  | 3.0 | 3.9
Higher Education [Member] | Global Public Finance [Member] | U S [Member] |  |  |
Insurance in Force |  | 1.5 | 2.2
Gross Par Amount |  | 1.1 | 1.5
Health Care [Member] | Global Public Finance [Member] | U S [Member] |  |  |
Insurance in Force |  | 1.2 | 1.4
Gross Par Amount |  | 0.8 | 1.0
Military Housing [Member] | Global Public Finance [Member] | U S [Member] |  |  |
Insurance in Force |  | 14.8 | 15.2
Gross Par Amount |  | 7.0 | 7.1
Investor-Owned Utilities [Member] | Global Public Finance [Member] | U S [Member] |  |  |
Insurance in Force | [2] | 0.9 | 1.4
Gross Par Amount | [2] | 0.6 | 0.9
Municipal Housing [Member] | Global Public Finance [Member] | U S [Member] |  |  |
Insurance in Force |  | 0.1 | 0.2
Gross Par Amount |  | 0.1 | 0.1
Other Public Finance [Member] | Non-United States [Member] |  |  |
Insurance in Force | [3] | 0.1 | 0.2
Gross Par Amount | [3] | 0.1 | 0.1
Other Public Finance [Member] | Global Public Finance [Member] | U S [Member] |  |  |
Insurance in Force | [4] | 0.1 | 0.8
Gross Par Amount | [4] | 0.1 | 0.5
International Utilities [Member] | Non-United States [Member] |  |  |
Insurance in Force |  | 0.9 | 1.1
Gross Par Amount |  | 0.8 | 1.0
Sovereign Related And Sub-Sovereign [Member] | Non-United States [Member] |  |  |
Insurance in Force |  | 2.8 | 3.0
Gross Par Amount |  | 2.1 | 2.3
Collateralized Debt Obligations [Member] | Global Structured Finance [Member] |  |  |
Insurance in Force |  | 0.4 | 0.4
Gross Par Amount |  | 0.3 | 0.3
Residential Mortgage Backed Securities [Member] | Global Structured Finance [Member] |  |  |
Insurance in Force |  | 2.0 | 2.5
Gross Par Amount |  | 1.5 | 1.8
Commercial Mortgage Backed Securities [Member] | Global Structured Finance [Member] |  |  |
Insurance in Force |  | 0.5 | 0.5
Gross Par Amount |  | 0.2 | 0.2
Consumer Asset Backed [Member] | Global Structured Finance [Member] |  |  |
Insurance in Force |  | 0.3 | 0.4
Gross Par Amount |  | 0.3 | 0.3
Corporate Asset Backed [Member] | Global Structured Finance [Member] |  |  |
Insurance in Force | [5] | 0.8 | 3.0
Gross Par Amount | [5] | $ 0.6 | $ 1.7
[1] | Includes general obligation unlimited and limited (property) tax bonds, general fund obligation bonds and pension obligation bonds of states, cities, counties, schools and special districts.
[2] | Includes investor owned utilities, industrial development and pollution control revenue bonds.
[3] | Includes municipal owned entities backed by sponsoring local government and tax backed transactions.
[4] | Includes certain non-profit enterprises, stadium related financing.
[5] | As of December 31, 2020, all remaining insurance in force and gross par relating to structured insurance securitizations was terminated. As of December 31, 2019, includes structured insurance securitizations of $2.1 billion and $1.0 billion of insurance in force and gross par amount, respectively.

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