Fair Value of Financial Instruments (Fair Value Inputs Quantitative Information) (Details) (USD $) In Millions, unless otherwise specified							6 Months Ended			6 Months Ended				6 Months Ended					6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Discounted Cash Flow Valuation Technique [Member] Corporate Bonds [Member] Fixed Maturity AFS Securities [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Discounted Cash Flow Valuation Technique [Member] Foreign Government Bonds [Member] Fixed Maturity AFS Securities [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Discounted Cash Flow Valuation Technique [Member] Hybrid And Redeemable Preferred Securities [Member] Fixed Maturity AFS Securities [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Discounted Cash Flow Valuation Technique [Member] Equity AFS Securities [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Discounted Cash Flow Valuation Technique [Member] Indexed Annuity and Universal Life Contracts [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Discounted Cash Flow Valuation Technique [Member] Minimum [Member] Corporate Bonds [Member] Fixed Maturity AFS Securities [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Discounted Cash Flow Valuation Technique [Member] Minimum [Member] Foreign Government Bonds [Member] Fixed Maturity AFS Securities [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Discounted Cash Flow Valuation Technique [Member] Minimum [Member] Equity AFS Securities [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Discounted Cash Flow Valuation Technique [Member] Minimum [Member] Indexed Annuity and Universal Life Contracts [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Discounted Cash Flow Valuation Technique [Member] Maximum [Member] Corporate Bonds [Member] Fixed Maturity AFS Securities [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Discounted Cash Flow Valuation Technique [Member] Maximum [Member] Foreign Government Bonds [Member] Fixed Maturity AFS Securities [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Discounted Cash Flow Valuation Technique [Member] Maximum [Member] Equity AFS Securities [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Discounted Cash Flow Valuation Technique [Member] Maximum [Member] Indexed Annuity and Universal Life Contracts [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Monte Carlo Simulation Valuation Technique [Member] GLB Embedded Derivative Reserves [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Monte Carlo Simulation Valuation Technique [Member] Minimum [Member] GLB Embedded Derivative Reserves [Member]	Jun. 30, 2013 Significant Unobservable Inputs (Level 3) [Member] Monte Carlo Simulation Valuation Technique [Member] Maximum [Member] GLB Embedded Derivative Reserves [Member]
Assets Fair Value Disclosure [Abstract]
Assets Fair Value Disclosure	$ 190,865	$ 187,710	$ 4,477	$ 4,055	$ 1,236	$ 76	$ 20	$ 14										$ 292
Liquidity Duration Adjustment							2.40%			0.60%	2.70%	4.30%		15.10%	4.20%	4.50%
Liabilities Fair Value Disclosure [Abstract]
Liabilities measured at fair value	$ (2,305)	$ (3,198)	$ (971)	$ (1,780)					$ (862)
Fair Value Inputs [Abstract]
Lapse Rate													1.00%				15.00%		1.00%	27.00%
Utilization of guaranteed withdrawal																			90.00%	100.00%
NPR																			0.00%	0.57%
Fair Value Assumptions Expected Volatility Rate																			1.00%	35.00%