Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues
Premiums Earned, Net	$ 3,484	$ 3,404	$ 10,332	$ 10,117
Fee income	432	448	1,280	1,376
Net investment income (loss):
Net Investment Income (Loss)	772	730	2,203	2,335
Net realized capital gains (losses):
Total other-than-temporary impairment (OTTI) losses	(15)	(42)	(50)	(67)
Other than Temporary Impairment Losses, Investments, Reclassification Adjustment of Noncredit Portion Included in Net Income, Availabe-for-sale Securities, before Tax	1	2	6	4
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	(14)	(40)	(44)	(63)
Gain (Loss) on Investments, Excluding Other than Temporary Impairments	(3)	(4)	(75)	33
Total Realized Investment Gains (Losses)	(17)	(44)	(119)	(30)
Other revenues	24	24	67	66
Total revenues	4,695	4,562	13,763	13,864
Benefits, losses and expenses
Benefits, losses and loss adjustment expenses	2,780	2,710	8,563	8,085
Amortization of deferred policy acquisition costs and present value of future profits	403	434	1,145	1,212
Insurance operating costs and other expenses	898	971	2,719	2,829
Gains (Losses) on Extinguishment of Debt	0	0	0	(21)
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal			0	28
Interest expense	86	88	257	271
Benefits, Losses and Expenses	4,167	4,183	12,684	12,390
Income from continuing operations before income taxes	528	379	1,079	1,474
Income Tax Expense (Benefit)	90	7	102	222
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	438	372	977	1,252
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0	9	0	9
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 438	$ 381	$ 977	$ 1,261
Net income available to common shareholders per common share
Basic	$ 1.14	$ 0.92	$ 2.50	$ 3.01
Diluted	1.12	0.90	2.45	2.94
Cash dividends declared per common share	$ 0.21	$ 0.21	$ 0.63	$ 0.57
Reinsurance Loss on Dispositions [Member]
Benefits, losses and expenses
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ 0	$ 20	$ 0	$ 28