Gross Realized Gains and Losses on Sales and OTTI on Securities Available for Sale (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Gross realized gains	$ 0		$ 1,944	[1]	$ 4		$ 1,980	[1]
Available-for-sale Securities, Gross Realized Losses	0		0		(1)		0
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	0		(3)		(1)		(7)
Gain (Loss) on Sale of Securities, Net	$ 0	[2]	$ 1,941	[3]	$ 2	[3]	$ 1,973	[3]

[1] Included in these amounts are $305 million in losses recognized during the three and nine months ended September 30, 2012 related to the termination of the Agreements that hedge the Coke common stock.

[2] Includes OTTI securities for which credit losses have been recorded in earnings in current or prior periods.

[3] Total OTTI was $0 million for the three months ended September 30, 2013 and 2012. Of total OTTI, losses of $0 million and $3 million were recognized in earnings, and gains of $0 million and $3 million were recognized as non-credit-related OTTI in OCI for the three months ended September 30, 2013 and 2012, respectively. Total OTTI was $0 million for the nine months ended September 30, 2013 and 2012. Of total OTTI, losses of $1 million and $7 million were recognized in earnings, and gains of $1 million and $7 million were recognized as non-credit-related OTTI in OCI for the nine months ended September 30, 2013 and 2012, respectively.