Equity (All Other Net Unrealized Investment Gains and Losses in AOCI) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ 16,050
Ending Balance	12,285	$ 16,050
Other Net Unrealized Investment Gains and Losses | Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	19,047	10,231	$ 11,433
Net investment gains (losses) on investments arising during the period	(4,043)	11,736	(2,863)
Reclassification adjustment for (gains) losses included in net income	(1,427)	(1,175)	(233)
Reclassification adjustment for OTTI losses excluded from net income	10	3	5
Impact of net unrealized investment (gains) losses on DAC, DSI, and VOBA	455	(482)	331
Impact of net unrealized investment (gains) losses on future policy benefits and policyholders’ account balances	133	(392)	301
Impact of net unrealized investment (gains) losses on policyholders’ dividends	1,452	(874)	1,257
Ending Balance	15,627	19,047	10,231
Other Net Unrealized Investment Gains and Losses | Net Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	36,764	20,494	25,151
Net investment gains (losses) on investments arising during the period	(6,311)	18,073	(4,306)
Reclassification adjustment for (gains) losses included in net income	(2,228)	(1,807)	(359)
Reclassification adjustment for OTTI losses excluded from net income	15	4	8
Ending Balance	28,240	36,764	20,494
Other Net Unrealized Investment Gains and Losses | DAC, DSI, and VOBA
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(1,455)	(719)	(1,228)
Impact of net unrealized investment (gains) losses on DAC, DSI, and VOBA	695	(736)	509
Ending Balance	(760)	(1,455)	(719)
Other Net Unrealized Investment Gains and Losses | Future Policy Benefits and Policyholders’ Account Balances
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(1,282)	(679)	(1,144)
Impact of net unrealized investment (gains) losses on future policy benefits and policyholders’ account balances	200	(603)	465
Ending Balance	(1,082)	(1,282)	(679)
Other Net Unrealized Investment Gains and Losses | Policyholders’ Dividends
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(5,036)	(3,694)	(5,627)
Impact of net unrealized investment (gains) losses on policyholders’ dividends	2,234	(1,342)	1,933
Ending Balance	(2,802)	(5,036)	(3,694)
Other Net Unrealized Investment Gains and Losses | Deferred Income Tax (Liability) Benefit
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(9,944)	(5,171)	(5,719)
Net investment gains (losses) on investments arising during the period	2,268	(6,337)	1,443
Reclassification adjustment for (gains) losses included in net income	801	632	126
Reclassification adjustment for OTTI losses excluded from net income	(5)	(1)	(3)
Impact of net unrealized investment (gains) losses on DAC, DSI, and VOBA	(240)	254	(178)
Impact of net unrealized investment (gains) losses on future policy benefits and policyholders’ account balances	(67)	211	(164)
Impact of net unrealized investment (gains) losses on policyholders’ dividends	(782)	468	(676)
Ending Balance	$ (7,969)	$ (9,944)	$ (5,171)