Commitments and Contingencies (Details Textual) (USD $)	Mar. 31, 2014
Commitments and Contingencies (Textual) [Abstract]
Fair value of all derivative instruments with credit-risk-related contingent features	$ 1,000,000,000
Collateral posted by insurance operating entities	1,100,000,000
Notional Value Impacted by Ratings Downgrade	10,300,000,000
Fair Value Impacted by Ratings Downgrade	(34)
Single Notch Downgrade [Member]
Commitments and Contingencies (Textual) [Abstract]
Additional assets to be posted as collateral	10,000,000
Double Notch Downgrade [Member]
Commitments and Contingencies (Textual) [Abstract]
Additional assets to be posted as collateral	30,000,000
GMWB Product Derivatives [Member]
Commitments and Contingencies (Textual) [Abstract]
Derivative Instrument, Collateral Payment, Preventing Termination	$ 44,000,000