XML 88 R76.htm IDEA: XBRL DOCUMENT v3.20.2
Fair Value Measurement - Narrative (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
USD ($)
Security
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Security
Jun. 30, 2019
USD ($)
Dec. 31, 2019
Apr. 08, 2005
USD ($)
Trust
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Fair value gains (losses) on Committed Capital Securities $ 25,000,000 $ (19,000,000) $ (23,000,000) $ (10,000,000)    
Percentage of CDS contracts fair valued using minimum premium (de minimis) 0.00%   0.00%      
Recurring [Member] | Level 3 [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Number of fixed maturity securities valued using model processes | Security 159   159      
Fixed maturity securities $ 1,094,000,000   $ 1,094,000,000      
Measurement Input, Default Rate [Member] | Total [Member] | Recurring [Member] | Level 3 [Member] | Minimum [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Transferor's continuing involvement, servicing assets or liabilities, prepayment speed     0.23%   1.69%  
Measurement Input, Default Rate [Member] | Total [Member] | Recurring [Member] | Level 3 [Member] | Maximum [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Transferor's continuing involvement, servicing assets or liabilities, prepayment speed     0.89%   2.08%  
AGC [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Number of custodial trusts | Trust           4
Share value, amount           $ 200,000,000
Maximum amount           $ 50,000,000