CONSTRUCTION OF TERMINAL 6 AT LAX (Details) (Construction in Progress [Member], USD $) In Millions	Sep. 30, 2011
Construction in Progress [Member]
Other Assets [Line Items]
LAX airport project companys responsibility amount before reimbursement	$ 175
LAX airport project estimated total cost	250
LAX airport project companys responsibility amount after reimbursement	25
LAX airport project portion included in property and equipment	107.0
LAX airport project reimbursement and credits in other long-term liabilities	$ 11.4