v3.8.0.1
Policyholders' Liabilities (Policyholders' Account Balances) (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Liability for Policyholders' Account Balance, by Product Segment [Line Items]    
Total policyholders’ account balances $ 148,189 $ 145,205
Individual annuities    
Liability for Policyholders' Account Balance, by Product Segment [Line Items]    
Total policyholders’ account balances 41,449 40,338
Group annuities    
Liability for Policyholders' Account Balance, by Product Segment [Line Items]    
Total policyholders’ account balances 28,152 28,350
Guaranteed investment contracts and guaranteed interest accounts    
Liability for Policyholders' Account Balance, by Product Segment [Line Items]    
Total policyholders’ account balances 14,002 14,528
Funding agreements    
Liability for Policyholders' Account Balance, by Product Segment [Line Items]    
Total policyholders’ account balances 4,631 4,794
Interest-sensitive life contracts    
Liability for Policyholders' Account Balance, by Product Segment [Line Items]    
Total policyholders’ account balances 36,879 34,452
Dividend accumulation and other    
Liability for Policyholders' Account Balance, by Product Segment [Line Items]    
Total policyholders’ account balances $ 23,076 $ 22,743