Discontinued Operations - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended			3 Months Ended
	Sep. 30, 2011 Credit Card Receivable [Member]	Dec. 31, 2012 Credit Card Receivable [Member]	Dec. 31, 2011 Credit Card Receivable [Member]	May 01, 2012 Credit Card Receivable [Member]	Dec. 31, 2010 Bank Note [Member]	Sep. 30, 2010 Bank Note [Member]	Dec. 31, 2012 Bank Note [Member]	Dec. 31, 2011 Bank Note [Member]	Oct. 31, 2010 Bank Note [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost or fair value adjustments	$ 440,000,000	$ 1,000,000,000	$ 604,000,000			$ 12,000,000
Cash consideration received upon sale of discontinued operations				19,200,000,000
Closure costs primarily relating to termination and other employee					14,000,000
Assets and liabilities of Banknotes Business reported of discontinued operations						23,000,000	0	0
Allocation of goodwill as held for sale						21,000,000
Cash consideration received upon sale of discontinued operations									$ 11,000,000