v3.8.0.1
Equity (All Other Net Unrealized Investment Gains and Losses in AOCI) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance $ 14,621    
Ending balance 17,074 $ 14,621  
Accumulated Other Comprehensive Income (Loss)      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance 14,621 12,285 $ 16,050
Ending balance 17,074 14,621 12,285
All Other | Net Unrealized Gains (Losses) on Investments      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance 32,420 28,240 36,764
Net investment gains (losses) on investments arising during the period 5,216 5,658 (6,311)
Reclassification adjustment for (gains) losses included in net income (1,544) (1,494) (2,228)
Reclassification adjustment for OTTI losses excluded from net income 20 16 15
Ending balance 36,112 32,420 28,240
All Other | DAC, DSI, VOBA and Reinsurance Recoverables      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance (1,056) (760) (1,455)
Impact of net unrealized investment (gains) losses on DAC, DSI, VOBA and reinsurance recoverables (524) (296) 695
Ending balance (1,580) (1,056) (760)
All Other | Future Policy Benefits, Policyholders’ Account Balances and Reinsurance Payables      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance (1,136) (1,082) (1,282)
Impact of net unrealized investment (gains) losses on future policy benefits, policyholders’ account balances and reinsurance payables (107) (54) 200
Ending balance (1,243) (1,136) (1,082)
All Other | Policyholders’ Dividends      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance (2,980) (2,802) (5,036)
Impact of net unrealized investment (gains) losses on policyholders’ dividends (651) (178) 2,234
Ending balance (3,631) (2,980) (2,802)
All Other | Deferred Income Tax (Liability) Benefit      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance (9,234) (7,969) (9,944)
Net investment gains (losses) on investments arising during the period (1,425) (1,910) 2,268
Reclassification adjustment for (gains) losses included in net income 421 504 801
Reclassification adjustment for OTTI losses excluded from net income (5) (5) (5)
Impact of net unrealized investment (gains) losses on DAC, DSI, VOBA and reinsurance recoverables 191 93 (240)
Impact of net unrealized investment (gains) losses on future policy benefits, policyholders’ account balances and reinsurance payables 25 (9) (67)
Impact of net unrealized investment (gains) losses on policyholders’ dividends 190 62 (782)
Ending balance (9,837) (9,234) (7,969)
All Other | Accumulated Other Comprehensive Income (Loss)      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance 18,014 15,627 19,047
Net investment gains (losses) on investments arising during the period 3,791 3,748 (4,043)
Reclassification adjustment for (gains) losses included in net income (1,123) (990) (1,427)
Reclassification adjustment for OTTI losses excluded from net income 15 11 10
Impact of net unrealized investment (gains) losses on DAC, DSI, VOBA and reinsurance recoverables (333) (203) 455
Impact of net unrealized investment (gains) losses on future policy benefits, policyholders’ account balances and reinsurance payables (82) (63) 133
Impact of net unrealized investment (gains) losses on policyholders’ dividends (461) (116) 1,452
Ending balance $ 19,821 $ 18,014 $ 15,627