XML 159 R96.htm IDEA: XBRL DOCUMENT v3.20.4
Investments - Additional Information (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Schedule of Investments [Line Items]      
Fair Value, Concentration of Risk, Investments $ 0 $ 0  
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 547    
Percentage of Gross Unrealized Losses Depressed Less than Twenty Percent of Cost or Amortized Cost 95.00%    
Number of loans held-for-sale 0 0  
Financing Receivable, Modifications, Number of Contracts 0    
LTV ratio 55.00%    
LTV ratio at origination 60.00%    
Continuing Involvement with Transferred Financial Assets, Principal Amount Outstanding $ 6,900 $ 6,400  
Loans serviced on behalf of third parties 3,700 3,500  
Loans serviced on behalf of third parties, retained and reported as assets 3,200 2,900  
Servicing rights 0 0  
Maximum exposure to loss for variable interest $ 1,300 1,100  
Required collateral under securities lending 100.00%    
Assets Held by Insurance Regulators $ 2,600 2,300  
Income (Loss) from Equity Method Investments 244 267 $ 214
Equity method investments 2,000    
Commitments to fund limited partnership and alternative investments $ 804    
Aggregate investment income from limited partnerships and other alternative investments 10.00%    
Total assets $ 74,111 70,817  
Total liabilities 55,555 54,547  
Total net investment income 1,846 1,951 1,780
Limited Partner [Member]      
Schedule of Investments [Line Items]      
Total net investment income 954 618 773
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] | Limited Partner [Member]      
Schedule of Investments [Line Items]      
Total assets 339,600 329,400  
Total liabilities 181,500 191,200  
Total net investment income 7,400 13,400 $ 12,300
Fair Value Measured at Net Asset Value Per Share [Member]      
Schedule of Investments [Line Items]      
Deposit Assets $ 54 38  
Maximum      
Schedule of Investments [Line Items]      
Term of security lending agreement 90 days    
Minimum [Member]      
Schedule of Investments [Line Items]      
Percentage of fair value received at sale under repurchase agreements 95.00%    
Variable Interest Entity, Not Primary Beneficiary [Member]      
Schedule of Investments [Line Items]      
Commitments for variable interest $ 768 $ 851  
CMBS      
Schedule of Investments [Line Items]      
Largest exposure by sector, percent of invested assets 8.00% 8.00%  
US Treasury Securities [Member]      
Schedule of Investments [Line Items]      
Debt Securities, Available-for-sale, Restricted $ 34 $ 37  
Commercial Loan [Member]      
Schedule of Investments [Line Items]      
Financing Receivable, Individually Evaluated for Impairment 0    
Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price 0    
Fixed maturities, available-for-sale      
Schedule of Investments [Line Items]      
Debt Securities, Available-for-sale, Purchased with Credit Deterioration, Amount at Purchase Price $ 0    
Residential Mortgage Backed Securities [Member]      
Schedule of Investments [Line Items]      
Largest exposure by sector, percent of invested assets   9.00%  
Financial Services Sector [Member]      
Schedule of Investments [Line Items]      
Largest exposure by sector, percent of invested assets 9.00%    
Fixed maturities      
Schedule of Investments [Line Items]      
Interest Receivable $ 327 $ 334  
Fixed maturities | Syndicate Policyholders [Member]      
Schedule of Investments [Line Items]      
Debt Securities, Available-for-sale, Restricted 661 447  
Fixed maturities | Lloyd's of London [Member]      
Schedule of Investments [Line Items]      
Debt Securities, Available-for-sale, Restricted 175    
Mortgage loans      
Schedule of Investments [Line Items]      
Interest Receivable 14 14  
Mortgage loans | Commercial Loan [Member]      
Schedule of Investments [Line Items]      
Financing Receivable, Past Due $ 0 $ 0  
Debt Security, Government, Non-US [Member] | Government of United Kingdom [Member]      
Schedule of Investments [Line Items]      
Largest exposure by issuer, percent of invested assets (less than)   1.00%  
Domestic [Member]      
Schedule of Investments [Line Items]      
Collateral provided by borrowers under securities lending 102.00%    
Non-domestic [Member]      
Schedule of Investments [Line Items]      
Collateral provided by borrowers under securities lending 105.00%    
Short-term Investments [Member] | Syndicate Policyholders [Member]      
Schedule of Investments [Line Items]      
Restricted Investments, Current $ 26 $ 189  
Municipal      
Schedule of Investments [Line Items]      
Largest exposure by sector, percent of invested assets 17.00% 18.00%  
Municipal | New York State Dormitory Authority [Member]      
Schedule of Investments [Line Items]      
Largest exposure by issuer, percent of invested assets (less than) 1.00% 1.00%  
Corporate Debt Securities [Member] | Apple Inc. [Member]      
Schedule of Investments [Line Items]      
Largest exposure by issuer, percent of invested assets (less than) 1.00%    
Corporate Debt Securities [Member] | IBM Corporation [Member]      
Schedule of Investments [Line Items]      
Largest exposure by issuer, percent of invested assets (less than) 1.00%    
Corporate Debt Securities [Member] | Wells Fargo & Company [Member]      
Schedule of Investments [Line Items]      
Largest exposure by issuer, percent of invested assets (less than)   1.00%