Investments (Available-For-Sale Securities By Contractual Maturities) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Available-for-sale Securities, Debt Maturities, Amortized Cost
Due in one year or less	$ 2,338
Due after one year through five years	17,352
Due after five years through ten years	22,426
Due after ten years	31,997
Amortized cost	79,287	77,217
Available-for-sale Securities, Debt Maturities, Fair Value
Due in one year or less	2,388
Due after one year through five years	18,852
Due after five years through ten years	23,467
Due after ten years	36,022
Fair Value	86,180	80,976
Fixed Maturity Securities Excluding MBS and CDOs [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Amortized cost	74,113
Available-for-sale Securities, Debt Maturities, Fair Value
Fair Value	80,729
Fixed Maturity AFS Securities [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Amortized cost	79,070	77,035
Available-for-sale Securities, Debt Maturities, Fair Value
Fair Value	85,946	80,775
MBS [Member] | Fixed Maturity AFS Securities [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Amortized cost	4,670
Available-for-sale Securities, Debt Maturities, Fair Value
Fair Value	4,931
CLOs [Member] | Fixed Maturity AFS Securities [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Amortized cost	287	232
Available-for-sale Securities, Debt Maturities, Fair Value
Fair Value	$ 286	$ 225