XML 14 R82.htm IDEA: XBRL DOCUMENT ﻿
v2.3.0.11

Business Segments (Summary Of Premiums Earned On Financial Guarantees And Insured Derivatives By Geographic Location Of Risk) (Details) (USD $) In Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2011 | Jun. 30, 2010 | Jun. 30, 2011 | Jun. 30, 2010
Total premiums earned | $ 176 | $ 182 | $ 345 | $ 368
United States [Member] |  |  |  |
Total premiums earned | 130 | 141 | 252 | 283
United Kingdom [Member] |  |  |  |
Total premiums earned | 10 | 8 | 17 | 21
Europe (Excluding United Kingdom) [Member] |  |  |  |
Total premiums earned | 9 | 7 | 21 | 12
Internationally Diversified [Member] |  |  |  |
Total premiums earned | 9 | 9 | 18 | 18
Central And South America [Member] |  |  |  |
Total premiums earned | 10 | 11 | 19 | 21
Asia [Member] |  |  |  |
Total premiums earned | 5 | 3 | 12 | 7
Other [Member] |  |  |  |
Total premiums earned | $ 3 | $ 3 | $ 6 | $ 6

X
- Definition Premiums Earned Net Financial Guarantee Insurance Contracts And Insured Derivatives + Details
Name: | mbi_PremiumsearnedNetFinancialGuaranteeInsuranceContractsAndInsuredDerivatives
Namespace Prefix: | mbi
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration