Schedule of Pre-Tax Gain (Loss) Recognized in Net Income for Effects of Derivatives not Designated as Hedges (Detail) (Derivatives not designated as hedges, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Derivative [Line Items]
Pre-tax gain (loss) recognized in net income (loss)	$ 50		$ 87		$ (212)
Interest rate swaps | Net Investment Gains (Losses)
Derivative [Line Items]
Pre-tax gain (loss) recognized in net income (loss)	(7)		21		11
Interest rate swaps related to securitization entities | Net Investment Gains (Losses)
Derivative [Line Items]
Pre-tax gain (loss) recognized in net income (loss)	9	[1]	(4)	[1]	(16)	[1]
Credit default swaps | Net Investment Gains (Losses)
Derivative [Line Items]
Pre-tax gain (loss) recognized in net income (loss)	14		57		(45)
Credit default swaps related to securitization entities | Net Investment Gains (Losses)
Derivative [Line Items]
Pre-tax gain (loss) recognized in net income (loss)	77	[1]	76	[1]	(46)	[1]
Equity index options | Net Investment Gains (Losses)
Derivative [Line Items]
Pre-tax gain (loss) recognized in net income (loss)	(43)		(58)		8
Financial futures | Net Investment Gains (Losses)
Derivative [Line Items]
Pre-tax gain (loss) recognized in net income (loss)	(232)		(121)		175
Equity return swaps | Net Investment Gains (Losses)
Derivative [Line Items]
Pre-tax gain (loss) recognized in net income (loss)	(33)		(37)		3
Other foreign currency contracts | Net Investment Gains (Losses)
Derivative [Line Items]
Pre-tax gain (loss) recognized in net income (loss)	6		(19)		(16)
Reinsurance embedded derivatives | Net Investment Gains (Losses)
Derivative [Line Items]
Pre-tax gain (loss) recognized in net income (loss)	0		3		29
GMWB embedded derivatives | Net Investment Gains (Losses)
Derivative [Line Items]
Pre-tax gain (loss) recognized in net income (loss)	277		170		(316)
Fixed index annuity embedded derivatives | Net Investment Gains (Losses)
Derivative [Line Items]
Pre-tax gain (loss) recognized in net income (loss)	$ (18)		$ (1)		$ 1

[1] See note 18 for additional information related to consolidated securitization entities.