Investments (Available-For-Sale Securities By Contractual Maturities) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Available-for-sale Securities, Debt Maturities, Amortized Cost
Due in one year or less	$ 2,480
Due after one year through five years	16,960
Due after five years through ten years	22,794
Due after ten years	31,532
Amortized cost	78,903	77,217
Available-for-sale Securities, Debt Maturities, Fair Value
Due in one year or less	2,540
Due after one year through five years	18,580
Due after five years through ten years	24,182
Due after ten years	35,622
Fair Value	86,365	80,976
Fixed Maturity Securities Excluding MBS and CDOs [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Amortized cost	73,766
Available-for-sale Securities, Debt Maturities, Fair Value
Fair Value	80,924
Fixed Maturity AFS Securities [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Amortized cost	78,668	77,035
Available-for-sale Securities, Debt Maturities, Fair Value
Fair Value	86,109	80,775
MBS [Member] | Fixed Maturity AFS Securities [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Amortized cost	4,644
Available-for-sale Securities, Debt Maturities, Fair Value
Fair Value	4,929
CLOs [Member] | Fixed Maturity AFS Securities [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Amortized cost	258	232
Available-for-sale Securities, Debt Maturities, Fair Value
Fair Value	$ 256	$ 225