Investment in Lease Financing (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accumulated allowance for uncollectible minimum lease payments	$ 1,582	[1]	$ 1,854	[1]	$ 2,255	$ 3,004
Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accumulated allowance for uncollectible minimum lease payments	$ 53		$ 67

[1] At December 31, 2013 and 2012, includes $49 and $0 of cash and due from banks, $48 and $50 of commercial mortgage loans, $ 1,010 and $0 of automobile loans, $(15) and $(5) of ALLL, $13 and $3 of other assets, $1 and $0 of other liabilities, $ 1,048 and $0 of long-term debt from consolidated VIEs that are included in their respective captions. See Note 10.