Policyholder Account Balances, Future Policy Benefits and Claims and Separate Account Liabilities (Text) (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
Policy claims and other policyholders' funds	$ 869	$ 710
Change in liability for prior year incurred unpaid reported claims and claim adjustment expenses	$ (2)	9	$ 2
EIA host values [Member]
Liability for Policyholder Account Balances and Future Policy Benefits and Policy Claims and Other Policyholders Funds [Line Items]
EIA contract initial term	7 years
Minimum interest rate guarantee	3.00%
Percentage of initial premium receiving interest guarantee	90.00%
Property, liability and casualty insurance product line [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	$ 640	$ 518
Increase (Decrease) in liability for prior year incurred unpaid reported claims and claim adjustment expenses	58	54	42
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	$ 1,100	$ 1,000
Increase (Decrease) in liability for prior year incurred unpaid reported claims and claim adjustment expenses	60	42	38