Relationship and Transactions with Boeing - Intercompany Guarantee Amounts by Aircraft Type (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Types Of Aircraft [Line Items]
Guarantee Amount	$ 1,481	$ 1,577
Carrying Value	1,797	1,928
717 (out of production) [Member]
Types Of Aircraft [Line Items]
Guarantee Amount	1,401	1,481
Carrying Value	1,674	1,790
Out of production single-aisle aircraft [Member]
Types Of Aircraft [Line Items]
Guarantee Amount	43	55
Carrying Value	43	55
Other, including other Boeing aircraft [Member]
Types Of Aircraft [Line Items]
Guarantee Amount	37	41
Carrying Value	$ 80	$ 83