Components of Net Deferred Income Tax Liability (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Foreign tax credit carryforwards	$ 787	$ 666
Accrued commission and general expenses	199	203
State income taxes	302	275
Net operating loss carryforwards	1,727	1,797
Other	51	21
Gross deferred income tax assets	3,066	2,962
Valuation allowance	(353)	(296)
Total deferred income tax assets	2,713	2,666
Investments	29	86
Net unrealized gains on investment securities	639	1,260
Net unrealized gains on derivatives	218	222
Insurance reserves	751	491
DAC	863	1,115
PVFP and other intangibles	20	3
Investment in foreign subsidiaries	10	310
Other	52	37
Total deferred income tax liabilities	2,582	3,524
Net deferred income tax asset	131
Net deferred income tax (liability)	$ (24)	$ (858)