Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Level 3 Assets and Liabilities)(Footnotes to Table) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Mar. 31, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	$ 30	$ 12		$ 37	$ 26
Total gains (losses) included in: Net income	11	3		13	14
Free-standing derivatives, assets		3			3
Free Standing Derivative Liabilities, Fair Value Disclosure	9	9		9	9
Sold in LBL disposition					(347)
CMBS
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total gains (losses) included in: Net income		0		0	0
Sold in LBL disposition			$ 4		4
ABS
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total gains (losses) included in: Net income	0	0		(1)	0
Sold in LBL disposition					0
Assets held for sale
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total gains (losses) included in: Net income					(1)
Sold in LBL disposition			$ (4)		(351)
Net investment income
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total gains (losses) included in: Net income	3	3		9	9
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date	3	3		11	6
Interest credited to contractholder funds
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total gains (losses) included in: Net income	27	5		32	5
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date	27	5		32	5
Contract benefits
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date	(8)	$ 4		(8)	8
Discontinued Operations
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date					(4)
Realized capital gains and losses
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total gains (losses) included in: Net income	8			4	8
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date	(2)			(2)	$ 5
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Free-standing derivatives, assets	1			1		$ 2
Free Standing Derivative Liabilities, Fair Value Disclosure	$ 9			$ 9		$ 9