Equity (All Other Net Unrealized Investment Gains and Losses in AOCI) (Details) $ in Millions	3 Months Ended
Mar. 31, 2020 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 24,039
Ending balance	22,600
Accumulated Other Comprehensive Income (Loss) Related to Net Unrealized Investment Gains (Losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	28,112
Ending balance	26,937
All Other \| Net Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	45,339
Net investment gains (losses) on investments arising during the period	(1,422)
Reclassification adjustment for (gains) losses included in net income	(508)
Reclassification due to allowance for credit loses recorded during the period	80
Ending balance	43,489
All Other \| DAC, DSI, VOBA and Reinsurance Recoverables
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(1,585)
Impact of net unrealized investment (gains) losses on DAC, DSI, VOBA and reinsurance recoverables	419
Ending balance	(1,166)
All Other \| Future Policy Benefits, Policyholders’ Account Balances and Reinsurance Payables
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(2,909)
Impact of net unrealized investment (gains) losses on future policy benefits, policyholders’ account balances and reinsurance payables	62
Ending balance	(2,847)
All Other \| Policyholders’ Dividends
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(3,366)
Impact of net unrealized investment (gains) losses on policyholders’ dividends	132
Ending balance	(3,234)
All Other \| Deferred Income Tax (Liability) Benefit
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(9,367)
Net investment gains (losses) on investments arising during the period	225
Reclassification adjustment for (gains) losses included in net income	81
Reclassification due to allowance for credit loses recorded during the period	(13)
Impact of net unrealized investment (gains) losses on DAC, DSI, VOBA and reinsurance recoverables	(90)
Impact of net unrealized investment (gains) losses on future policy benefits, policyholders’ account balances and reinsurance payables	(15)
Impact of net unrealized investment (gains) losses on policyholders’ dividends	(28)
Ending balance	(9,207)
All Other \| Accumulated Other Comprehensive Income (Loss) Related to Net Unrealized Investment Gains (Losses)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	28,112
Net investment gains (losses) on investments arising during the period	(1,197)
Reclassification adjustment for (gains) losses included in net income	(427)
Reclassification due to allowance for credit loses recorded during the period	67
Impact of net unrealized investment (gains) losses on DAC, DSI, VOBA and reinsurance recoverables	329
Impact of net unrealized investment (gains) losses on future policy benefits, policyholders’ account balances and reinsurance payables	47
Impact of net unrealized investment (gains) losses on policyholders’ dividends	104
Ending balance	$ 27,035

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