Consolidated Statements of Operations Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues
Premiums Earned, Net	$ 13,577,000,000	$ 13,336,000,000	$ 13,231,000,000
Fee income	1,839,000,000	1,996,000,000	2,105,000,000
Net Investment Income	3,030,000,000	3,154,000,000	3,264,000,000
Net realized capital gains (losses):
Total other-than-temporary impairment (“OTTI”) losses	(108,000,000)	(64,000,000)	(93,000,000)
OTTI losses recognized in other comprehensive income (“OCI”)	6,000,000	5,000,000	20,000,000
Net OTTI losses recognized in earnings	102,000,000	59,000,000	73,000,000
Gain (Loss) on Disposition of Business	(28,000,000)	(23,000,000)	1,574,000,000
Net realized capital gains (losses), excluding net OTTI losses recognized in earnings	(54,000,000)	75,000,000	296,000,000
Realized Investment Gains (Losses)	(156,000,000)	16,000,000	1,798,000,000
Other revenues	87,000,000	112,000,000	275,000,000
Revenues	18,377,000,000	18,614,000,000	20,673,000,000
Benefits, losses and expenses
Benefits, losses and loss adjustment expenses	10,775,000,000	10,805,000,000	11,048,000,000
Amortization of deferred policy acquisition costs and present value of future profits	1,502,000,000	1,729,000,000	2,701,000,000
Insurance operating costs and other expenses	3,772,000,000	4,028,000,000	4,176,000,000
Loss on extinguishment of debt	21,000,000	0	213,000,000
Interest expense	357,000,000	376,000,000	397,000,000
Benefits, Losses and Expenses	16,399,000,000	16,915,000,000	19,202,000,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	1,978,000,000	1,699,000,000	1,471,000,000
Income Tax Expense (Benefit)	305,000,000	350,000,000	246,000,000
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	1,673,000,000	1,349,000,000	1,225,000,000
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	9,000,000	(551,000,000)	(1,049,000,000)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 1,682,000,000	$ 798,000,000	$ 176,000,000
Income from continuing operations, net of tax, available to common shareholders per common share
Income (Loss) from Continuing Operations, Per Basic Share	$ 4.03	$ 3.05	$ 2.71
Income (Loss) from Continuing Operations, Per Diluted Share	3.93	2.93	2.50
Net income (loss) available to common shareholders per common share
Earnings Per Share, Basic	4.05	1.81	0.37
Earnings Per Share, Diluted	3.96	1.73	0.36
Cash dividends declared per common share	$ 0.78	$ 0.66	$ 0.50
Retirement Plans and Individual Life Businesses [Member]
Net realized capital gains (losses):
Gain (Loss) on Disposition of Business			$ (71)
Gain (Loss) on Investments [Member]
Net realized capital gains (losses):
Gain (Loss) on Disposition of Business	$ 0	$ 0	(1,575,000,000)
Reinsurance Loss on Dispositions [Member]
Net realized capital gains (losses):
Gain (Loss) on Disposition of Business	(28,000,000)	(23,000,000)	1,574,000,000
Continuing Operations [Member]
Benefits, losses and expenses
Amortization of deferred policy acquisition costs and present value of future profits	$ 1,502,000,000	$ 1,729,000,000	$ 1,794,000,000