Policyholder Account Balances, Future Policy Benefits and Claims and Separate Account Liabilities (Text) (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Fixed annuities liabilities average interest rate	4.37%
Policy claims and other policyholders' funds	$ 884	$ 869
Change in liability for prior year incurred unpaid reported claims and claim adjustment expenses	$ (24)	(2)	$ 9
Minimum [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Fixed annuities liabilities interest rates	2.71%
Maximum [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Fixed annuities liabilities interest rates	9.38%
EIA host values [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Equity Indexed Annuity Contract Initial Term	7 years
Minimum interest rate guarantee	3.00%
Percentage of initial premium receiving interest guarantee	90.00%
LTC [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Unpaid reported claims interest rate	6.25%
LTC [Member] | Minimum [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Anticipated interest rate for future claims	5.90%
LTC [Member] | Maximum [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Anticipated interest rate for future claims	6.50%
Life, DI and LTC insurance [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Policy claims and other policyholders' funds	$ 1,200	1,100
Change in liability for prior year incurred unpaid reported claims and claim adjustment expenses	(6)	(60)	(42)
Property and Casualty [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Policy claims and other policyholders' funds	683	640
Change in liability for prior year incurred unpaid reported claims and claim adjustment expenses	(18)	$ 58	$ 54
Auto and Home [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Change in liability for prior year incurred unpaid reported claims and claim adjustment expenses	(20)
Catastrophe Insurance [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Change in liability for prior year incurred unpaid reported claims and claim adjustment expenses	$ 2
DI [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Unpaid reported claims interest rate	4.75%
DI [Member] | Minimum [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Anticipated interest rate for future claims	3.00%
DI [Member] | Maximum [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Anticipated interest rate for future claims	7.50%
Term and whole life insurance [Member] | Minimum [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Anticipated interest rate for future claims	3.00%
Term and whole life insurance [Member] | Maximum [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Anticipated interest rate for future claims	10.00%