Subsequent Events (Narrative) (Details) (USD $) In Billions, unless otherwise specified	6 Months Ended		0 Months Ended		6 Months Ended	12 Months Ended	24 Months Ended	36 Months Ended	48 Months Ended		0 Months Ended
	Jun. 30, 2011	Jun. 30, 2011 Boeing Family [Member]	Jul. 20, 2011 Boeing 737 Next Generation Aircraft [Member]	Jul. 20, 2011 Boeing 737 Next Generation Re-Engined Aircraft [Member]	Jun. 30, 2011 Boeing 737-800 Aircraft [Member]	Dec. 31, 2012 Boeing 737-800 Aircraft [Member]	Dec. 31, 2014 Boeing 737-800 Aircraft [Member]	Dec. 31, 2013 Boeing 737-800 Aircraft [Member]	Dec. 31, 2016 Boeing 737-800 Aircraft [Member]	Jun. 30, 2011 Airbus Family [Member]	Jul. 20, 2011 A320 family/B37- [Member]	Jul. 20, 2011 A320neo/B737- [Member]
Number of aircraft lease agreements							6	29			130
Number of aircraft purchase commitments			100	100	13	28			14			130
Additional rights to purchase aircraft	365
Contract Receivable Aircraft, Due Two Years	40
Contract Receivable Aircraft, Due Three Years	55
Contract Receivable Aircraft, Due Four Years	50
Contract Receivable Aircraft, Due Five Years	45
Contract Receivable Aircraft, Due Six Years	50
Contract Receivable Aircraft, Due Seven Years or After	120
Manufacturer Committed Financing	$ 13
Aircraft Deliveries Covered by Manufacturer Financing		100								130
Total Purchase Commitments	10.3
Future Minimum Lease Payments, Estimated	$ 24.3