Investment in Lease Financing (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable
Rental receivable, net of principal and interest on nonrecourse debt	$ 3,556		$ 3,543
Estimated residual value of leased assets	754		760
Initial direct cost, net of amortization	15		16
Gross investment in lease financing	4,325		4,319
Unearned income	700		758
Net investment in lease financing	$ 3,625	[1]	$ 3,561	[1]

[1] The accumulated allowance for uncollectible minimum lease payments was $53 million and $67 million at December 31, 2013 and 2012, respectively