Fair Value of Assets and Liabilities (Details 5) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Gains (losses) included in net income for Level 3 assets and liabilities:
Fair Value Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Earnings	$ 3	$ 11	$ 5	$ 12
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	9	(12)	5	3
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	13	(2)	7	14
Realized capital gains and losses
Gains (losses) included in net income for Level 3 assets and liabilities:
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date		4	(1)	5
Net investment income
Gains (losses) included in net income for Level 3 assets and liabilities:
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date	3	4	6	6
Interest credited to contractholder funds
Gains (losses) included in net income for Level 3 assets and liabilities:
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date	9	(10)	5
Contract benefits
Gains (losses) included in net income for Level 3 assets and liabilities:
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date		(1)		4
Discontinued Operations
Gains (losses) included in net income for Level 3 assets and liabilities:
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date				(4)
Gain (Loss) on Investments [Member]
Gains (losses) included in net income for Level 3 assets and liabilities:
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	12	(1)	10	15
Loss on disposition of operations
Gains (losses) included in net income for Level 3 assets and liabilities:
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date		2
Contractholder funds: Derivatives embedded in life and annuity contracts
Gains (losses) included in net income for Level 3 assets and liabilities:
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	9	(12)	5	(14)
Liabilities held for sale
Gains (losses) included in net income for Level 3 assets and liabilities:
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	0	0	0	17
Fixed income securities
Gains (losses) included in net income for Level 3 assets and liabilities:
Fair Value Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Earnings	2	4	4	6
Municipal
Gains (losses) included in net income for Level 3 assets and liabilities:
Fair Value Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Earnings	0	0	0	(1)
Corporate
Gains (losses) included in net income for Level 3 assets and liabilities:
Fair Value Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Earnings	3	4	5	7
ABS
Gains (losses) included in net income for Level 3 assets and liabilities:
Fair Value Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Earnings	0	0	0	0
CMBS
Gains (losses) included in net income for Level 3 assets and liabilities:
Fair Value Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Earnings	(1)	0	(1)	0
Assets held for sale
Gains (losses) included in net income for Level 3 assets and liabilities:
Fair Value Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Earnings	0	0	0	(1)
Free-standing derivatives, net
Gains (losses) included in net income for Level 3 assets and liabilities:
Fair Value Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Earnings	1	6	1	6
Other assets
Gains (losses) included in net income for Level 3 assets and liabilities:
Fair Value Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Earnings	$ 0	$ 1	$ 0	$ 1