Supplemental information to the Consolidated Statement of Cash Flows- Noncash Investing and Financing Transactions that are Not Reflected in Consolidated Statement of Cash Flows (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Supplemental Cash Flow Information [Abstract]
Transfers from loans to other assets for other real estate owned (“OREO”)	$ 1	$ 1
Change in assets of consolidated VIEs	179	245
Change in liabilities of consolidated VIEs	27	239
Change in noncontrolling interests of consolidated VIEs	12	27
Securities not settled	$ 1,167	$ 2,608