Asset Quality - Allowance for Loan and Lease Losses (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Receivables [Abstract]
Balance at beginning of period - continuing operations	$ 848	$ 888
Charge-offs	(57)	(90)
Recoveries	37	41
Net loans and leases charged off	(20)	(49)
Provision for loan and lease losses from continuing operations	6	55
Foreign currency translation adjustment		(1)
Balance at end of period - continuing operations	$ 834	$ 893