Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues
Premiums Earned, Net	$ 3,444	$ 3,391	$ 6,848	$ 6,713
Fee income	422	469	848	928
Net investment income (loss):
Net Investment Income (Loss)	735	796	1,431	1,605
Net realized capital gains (losses):
Total other-than-temporary impairment (OTTI) losses	(8)	(13)	(35)	(25)
Other than Temporary Impairment Losses, Investments, Reclassification Adjustment of Noncredit Portion Included in Net Income, Availabe-for-sale Securities, before Tax	1	2	5	2
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	(7)	(11)	(30)	(23)
Gain (Loss) on Investments, Excluding Other than Temporary Impairments	60	20	(72)	37
Total Realized Investment Gains (Losses)	53	9	(102)	14
Other revenues	23	20	43	42
Total revenues	4,677	4,685	9,068	9,302
Benefits, losses and expenses
Benefits, losses and loss adjustment expenses	3,142	2,812	5,783	5,375
Amortization of deferred policy acquisition costs and present value of future profits			742	778
Insurance operating costs and other expenses	912	910	1,821	1,858
Gains (Losses) on Extinguishment of Debt	0	(21)	0	(21)
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal			0	8
Interest expense	85	89	171	183
Benefits, Losses and Expenses	4,507	4,215	8,517	8,207
Income from continuing operations before income taxes	170	470	551	1,095
Income Tax Expense (Benefit)	(46)	57	12	215
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 216	$ 413	$ 539	$ 880
Net income available to common shareholders per common share
Basic	$ 0.55	$ 0.99	$ 1.36	$ 2.09
Diluted	0.54	0.96	1.34	2.04
Cash dividends declared per common share	$ 0.21	$ 0.18	$ 0.42	$ 0.36
Reinsurance Loss on Dispositions [Member]
Benefits, losses and expenses
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ 0	$ 8	$ 0	$ 8
Continuing Operations [Member]
Benefits, losses and expenses
Amortization of deferred policy acquisition costs and present value of future profits	$ 368	$ 391	$ 742	$ 778