Commitments and Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Unrecorded Unconditional Purchase Obligation [Line Items]
Contract carriers expiration dates	2016 to 2022
Terms Of Aircraft Lease	the lease would have (1) a rate equal to the debt payments of Chautauqua or Shuttle America for the debt financing of the aircraft calculated as if 90% of the aircraft was debt financed by Chautauqua or Shuttle America and (2) other specified terms and conditions
Rate Of Interest On The Equity To Be Paid On Exercising Put Right	10.00%
Capital Addition Purchase Commitments [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Aircraft Purchase Commitments, Total	$ 9,145
B 737 900ER [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required	88
A321-200 [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required	30
CRJ 900 [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required	28
B-787-8 aircraft [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required	18
A330-300 [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required	10
B 717 200 aircraft [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Other Aircraft Commitments	88
Number of Aircraft Delivered	13
Shuttle America [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Contract carriers expiration dates	January 2016
Aircraft Put Right	294
Equity Amount To Be Paid On Exercise Of Put Right	52
Chautauqua [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Aircraft Put Right	119
Equity Amount To Be Paid On Exercise Of Put Right	$ 25