INVESTMENTS - Net Effect on Shareholders' Equity of Unrealized Gains and Losses from Investment Securities (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Investments [Abstract]
Available-for-sale Securities, Gross Unrealized Gain (Loss)	$ 1,523	$ 3,932
Unamortized unrealized gains on securities transferred to held to maturity	11	20
Deferred income taxes	(499)	(1,382)
Shareholders' equity, unrealized gains (losses) on investment securities	$ 1,035	$ 2,570