XML 66 R55.htm IDEA: XBRL DOCUMENT v3.20.2
INVESTMENTS - Additional Information (Detail)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
investment
Jun. 30, 2020
investment
Mar. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
investment
Jan. 01, 2020
USD ($)
Dec. 31, 2019
USD ($)
Schedule of Investments [Line Items]              
Held to maturity securities transferred to available for sale securities, number of investments | investment 0 0     0    
Equity securities, FV-NI, unrealized gain (loss) $ 31     $ (109)      
Available for sale, fixed maturity securities, allowance for credit losses 38     38      
Transitional real estate loan commitments 657     657      
Commercial mortgage loan commitments 0     0      
Middle market loan program unfunded amount 26     26     $ 99
Middle market loan commitments 2,300     2,300      
Middle Market Loan Commitment Increase During Period     $ 2,200        
Securities held to maturity, fixed maturities, amortized cost 23,946     23,946     30,085
Loan Commitments, Allowance for Credit Loss 31     31      
Limited partnerships investment commitments $ 1,500     $ 1,500      
Percentage that the lending policy requires that the fair value of the securities received as collateral be of the fair value of the loaned securities 102.00%     102.00%      
Percentage that the lending policy requires that the fair value of the unrestricted cash received as collateral be of the fair value of the loaned securities 100.00%     100.00%      
Securities Lending, Securities Received as Collateral $ 6,176     $ 6,176     $ 4,759
Middle Market Loan Commitment with External Manager, Remaining Commitment Outstanding       2,000      
Accounting Standards Update 2019-04              
Schedule of Investments [Line Items]              
New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Reclassification From Held To Maturity To Available For Sale Debt Securities           $ 6,900  
New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Unrealized Gain Loss Net Of Tax Reclassification To Accumulated Other Comprehensive Income           $ 848  
Zero-credit-loss expectation | Japan government and agencies              
Schedule of Investments [Line Items]              
Securities held to maturity, fixed maturities, amortized cost $ 22,800     $ 22,800      
CALIFORNIA | Commercial Mortgage and Transitional Real Estate Loans              
Schedule of Investments [Line Items]              
Concentration Risk, Percentage       21.00%      
TEXAS | Commercial Mortgage and Transitional Real Estate Loans              
Schedule of Investments [Line Items]              
Concentration Risk, Percentage       14.00%      
FLORIDA | Commercial Mortgage and Transitional Real Estate Loans              
Schedule of Investments [Line Items]              
Concentration Risk, Percentage       11.00%