Segment Information (Earnings) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ (4,708)	$ 1,054	$ 290
Income Tax Expense (Benefit)	(1,771)	215	(5)
Expenses
Gain (Loss) on Investments	(32)	36	(469)
Gain (Loss) on Derivative Instruments, Net, Pretax	(5,878)	(424)	(181)
Other Income	761	504	539
Net income (loss)	(2,937)	839	295
Revenues	1,180	7,104	6,903
Annuities
Expenses
Interest Revenue (Expense), Net	1,412	1,245	1,177
Interest Expense	0	0	0
Life
Expenses
Interest Revenue (Expense), Net	295	296	295
Interest Expense	0	0	5
Run-off
Expenses
Interest Revenue (Expense), Net	1,235	1,360	1,384
Interest Expense	0	0	0
Corporate & Other
Expenses
Interest Revenue (Expense), Net	62	(60)	(109)
Interest Expense	67	68	68
Operating Segments
Revenues
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	1,134	1,647	1,624
Income Tax Expense (Benefit)	296	423	420
Operating Income (Loss)	838	1,224	1,204
Expenses
Revenues	6,939	7,264	7,180
Operating Segments | Annuities
Revenues
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	1,399	1,318	1,221
Income Tax Expense (Benefit)	411	329	295
Operating Income (Loss)	988	989	926
Expenses
Revenues	4,295	4,528	4,677
Operating Segments | Life
Revenues
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(138)	(54)	(152)
Income Tax Expense (Benefit)	(50)	(21)	(56)
Operating Income (Loss)	(88)	(33)	(96)
Expenses
Revenues	725	738	568
Operating Segments | Run-off
Revenues
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(63)	590	664
Income Tax Expense (Benefit)	(25)	204	227
Operating Income (Loss)	(38)	386	437
Expenses
Revenues	1,919	1,998	1,935
Operating Segments | Corporate & Other
Revenues
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(64)	(207)	(109)
Income Tax Expense (Benefit)	(40)	(89)	(46)
Operating Income (Loss)	(24)	(118)	(63)
Expenses
Revenues	176	188	134
Significant Reconciling Items
Revenues
Income Tax Expense (Benefit)	2,067	208	425
Expenses
Gain (Loss) on Investments	(32)	36	(469)
Gain (Loss) on Derivative Instruments, Net, Pretax	(5,878)	(424)	(181)
Other Income	68	(205)	(684)
Revenues	(25)	40	239
Intersegment Eliminations [Member] | Annuities
Expenses
Revenues	722	590	729
Intersegment Eliminations [Member] | Life
Expenses
Revenues	(867)	(740)	(703)
Intersegment Eliminations [Member] | Run-off
Expenses
Revenues	(127)	(72)	(275)
Intersegment Eliminations [Member] | Corporate & Other
Expenses
Revenues	$ (40)	$ 137	$ 66