XML 99 R85.htm IDEA: XBRL DOCUMENT v3.21.2
Income Taxes Income Taxes - Provision for Income Taxes Charged To Income From Continuing Operations (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Apr. 01, 2023
Provision for Income Taxes [Line Items]          
Current Federal Tax Expense (Benefit) $ 0 $ 0 $ 0 $ 0  
Income (Loss) from Continuing Operations before Income Taxes, Domestic 8 (106) (2) (412)  
Current Income Tax Expense (Benefit) 2 (1) 9 1  
Deferred Foreign Income Tax Expense (Benefit) 0 1 6 (5)  
Deferred Income Tax Expense (Benefit) 0 1 6 (5)  
Income Tax Expense (Benefit) 2 0 15 (5)  
Income (Loss) from Continuing Operations before Income Taxes, Foreign 11 (2) 23 (15)  
Pre-tax income (loss) 19 (108) 21 (427)  
Current State and Local Tax Expense (Benefit) 0 0 1 0  
Current Foreign Tax Expense (Benefit) $ 2 $ (1) 7 $ 0  
Ambac UK [Member]          
Provision for Income Taxes [Line Items]          
Deferred Income Taxes and Tax Credits     $ 6    
Statutory Effective Income Tax Rate 19.00%   19.00%    
Ambac UK [Member] | Subsequent Event          
Provision for Income Taxes [Line Items]          
Statutory Effective Income Tax Rate         25.00%