INVESTMENTS - Pretax Other-Than-Temporary Impairment Losses by Investment Category (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	$ 199	[1]	$ 977	[1]	$ 1,901	[1]
Credit-related impairment
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	45		597		1,286
Severity and duration of decline in fair value impairment
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	26		27
Change in intent impairment
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	128		353		615
Perpetual securities
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	70		243		565
Corporate Bonds
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	102		345		1,316
Mortgage- and asset-backed Securities
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	0		3		17
Municipalities
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	0		0		2
Sovereign and Supranational
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	26		386		0
Equity securities
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses	$ 1		$ 0		$ 1

[1] Includes $45, $597 and $1,286 for the years ended December 31, 2013, 2012 and 2011, respectively, for credit-related impairments; $26 and $27 for the years ended December 31, 2013 and 2012, respectively, for impairments due to severity and duration of decline in fair value; and $128, $353 and $615 for the years ended December 31, 2013, 2012 and 2011, respectively, from change in intent to sell securities