Commitments, Contingencies, Guarantees and Indemnities (Details 2) (USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended
	Oct. 31, 2006 item	Jun. 30, 2014 item
Engines And Related Equipment [Member]
Purchase commitments
Number of items to be purchased		3
Spare Engines C F M567 B And C F M565 B [Member] | C F M International [Member]
Purchase commitments
Maximum number of items to be purchased	45
Commitment period	5 years
Option to purchase additional quantity	30
Number of engines for which purchase orders are outstanding		1
Aircraft And Related Equipment [Member]
Purchase commitments
Number of items to be purchased		1
Engines Aircraft And Related Equipment [Member]
Purchase commitments
Purchase price		$ 29.8
Non-refundable deposits paid		$ 1.9