ASSETS CONSTRUCTED FOR OTHERS (TERMINAL 6 AT LAX) (DETAILS) (Construction in Progress [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Construction in Progress [Member]
Other Assets [Line Items]
LAX airport project estimated total cost	$ 235.0
LAX airport project companys responsibility amount after reimbursement	25
LAX airport project portion included in property and equipment	152.1
LAX airport project reimbursement and credits in other long-term liabilities	17.7
LAX airport project captilalized interest	4.5
LAX airport project deferred interest	6.2
LAX expected capital expenditures	$ 83