v3.2.0.727

Investments (Schedule Of Fixed Maturities By Contractual Maturity) (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Available for sale, Due in 1 year or less, Amortized Cost	$ 1,906	$ 2,187
Available for sale, Due after 1 year through 5 years, Amortized Cost	16,377	15,444
Available for sale, Due after 5 years though 10 years, Amortized Cost	14,321	15,663
Available for sale, Due after 10 years, Amortized Cost	4,388	4,521
Available for sale, Subtotal, Amortized Cost	36,992	37,815
Available for sale, Mortgage-backed securities, Amortized Cost	10,607	10,011
Available for sale, Amortized Cost	47,599	47,826
Available for sale, Fair Value	48,701	49,395
Held to maturity, Due in 1 year or less, Amortized Cost	377	353
Held to maturity, Due after 1 year through 5 years, Amortized Cost	2,589	2,603
Held to maturity, Due after 5 years through 10 years, Amortized Cost	2,351	1,439
Held to maturity, Due after 10 years, Amortized Cost	1,531	953
Held to maturity, Subtotal, Amortized Cost	6,848	5,348
Held to maturity, Mortgage backed securities, Amortized Cost	1,828	1,983
Available for sale, Due in 1 year or less, Fair Value	1,925	2,206
Available for sale, Due after 1 year through 5 years, Fair Value	16,808	15,857
Available for sale, Due after 5 years through 10 years, Fair Value	14,549	16,089
Available for sale, Due after 10 years, Fair Value	4,635	4,957
Available for sale, Subtotal, Fair Value	37,917	39,109
Available for sale, Mortgage backed securities, Fair Value	10,784	10,286
Held to maturity, Due in 1 year or less, Fair Value	381	355
Held to maturity, Due after 1 year through 5, Fair Value	2,685	2,693
Held to maturity, Due after 5 years through 10 years, Fair Value	2,351	1,489
Held to maturity, Due after 10 years, Fair Value	1,511	1,013
Held to maturity, Subtotal, Fair Value	6,928	5,550
Held to maturity, Mortgage backed securities, Fair Value	1,877	2,039
Held to maturity, Amortized Cost	8,676	7,331
Held to maturity, Fair Value	$ 8,805	$ 7,589

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