Relationship and Transactions with Boeing - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended			1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jan. 15, 2013 Issuance of Debt [Member]	Dec. 31, 2012 Revolving Credit Line Due Two Thousand Thirteen [Member]	Dec. 31, 2012 Revolving Credit Line Due Two Thousand Seventeen [Member]
Guarantor Obligations [Line Items]
Percentage of ownership	51.00%
Fixed-charge coverage ratio Maximum	1.05%
Level of tangible net worth	$ 50
Bank access to 364-day line credit					750	750
364-day line credit						2,300
Maturity period of 364-day line of credit	1 year
Outstanding amount under credit facilities	0	0
Borrowed amount under intercompany borrowing and lending arrangement				400
Amounts outstanding under intercompany borrowing and lending arrangement	0	0
Maximum Beneficiary	1,481
Portfolio Assets Totaling	1,797
Deferred Revenue	33	38
Asset impairment and accrued expenses	29	9	87
Provision for recovery of losses	(5)	(244)	34
Operating lease income exclusive of subsidies			6
Sale of asset at lease			26
New business volume	290	105	39
Dividend paid	89	228
Charges on employees benefit plan	$ 25	$ 21	$ 19