XML 49 R33.htm IDEA: XBRL DOCUMENT v3.20.2
Special Purpose Entities, Including Variable Interest Entities - Additional Information (Detail)
$ in Millions
 3 Months Ended 6 Months Ended
Feb. 12, 2020
USD ($)
Jun. 30, 2020
USD ($)
Entity
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Entity
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Entity
Variable Interest Entities [Line Items]            
Variable Interest Entity Change in Fair Value of Assets and Liabilities   $ (2) $ 3 $ (2) $ 5  
Realized Investment Gains (Losses)   10 36 18 53  
Deconsolidated VIE Assets     292   292  
Deconsolidated VIE Liabilities     364   364  
Fair value of special purpose entities   2   2   $ 3
variable interest entities deconsolidation gain loss $ 15 0 0 0 15  
Variable Interest Entity, Measure of Activity, Income or Loss before Tax   0 3 3 19  
Other investments   401   401   478
Long-term debt   2,749   $ 2,749   2,822
Asset-Backed Securities and Utility Obligations [Member]            
Variable Interest Entities [Line Items]            
Weighted average life       7 months 6 days    
Average rating of assets held by sponsored special purpose entities       BBB+    
Sponsored Variable Interest Entities [Member]            
Variable Interest Entities [Line Items]            
Total principal amount of debt outstanding   377   $ 377   403
Variable Interest Entities [Member]            
Variable Interest Entities [Line Items]            
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, before Tax   1 0 (3) 0  
VIE Change in FV of Assets Liabilities, Net of Credit Risk Change   (1) 3 (5) 4  
Variable Interest Entity, Primary Beneficiary [Member]            
Variable Interest Entities [Line Items]            
Other Expenses   0 $ 1 0 1  
Long-term debt   $ 4,125   $ 4,125   $ 4,554
Consolidated Entities [Member]            
Variable Interest Entities [Line Items]            
Number of Newly Consolidated Variable Interest Entities   0 0      
Number of DeConsolidated Variable Interest Entities   0 0      
Number Of Consolidated Variable Interest Entities | Entity   6   6   7
Variable Interest Entity, Primary Beneficiary [Member]            
Variable Interest Entities [Line Items]            
Interest Expense, Long-term Debt   $ (1) $ (4) $ (3) $ (6)  
Long-term debt   $ 4,125   $ 4,125   $ 4,554
Variable Interest Entity, Primary Beneficiary [Member]            
Variable Interest Entities [Line Items]            
Number of DeConsolidated Variable Interest Entities       1 0  
Ambac UK [Member] | Consolidated Entities [Member]            
Variable Interest Entities [Line Items]            
Number Of Consolidated Variable Interest Entities | Entity   5   5   6
Ambac UK [Member] | Variable Interest Entity, Primary Beneficiary [Member]            
Variable Interest Entities [Line Items]            
Long-term debt   $ 3,953   $ 3,953   $ 4,351
Ambac Assurance [Member]            
Variable Interest Entities [Line Items]            
Carry Value Secured Notes from LSNI   467   467   535
Fixed Income Investments [Member] | Variable Interest Entity, Primary Beneficiary [Member]            
Variable Interest Entities [Line Items]            
Gross Investment Income, Operating   2 4 3 $ 5  
Fixed Income Investments [Member] | Variable Interest Entity, Primary Beneficiary [Member]            
Variable Interest Entities [Line Items]            
Realized Investment Gains (Losses)   0 $ 2 8 $ 2  
Ambac Note Post Exit From Rehabilitation [Member] | Ambac Assurance Corporation [Member]            
Variable Interest Entities [Line Items]            
Long-term debt   $ 1,659   $ 1,659   $ 1,763