Annual report pursuant to Section 13 and 15(d)

SUBSEQUENT EVENTS SUBSEQUENT EVENTS (Details)

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SUBSEQUENT EVENTS SUBSEQUENT EVENTS (Details)
12 Months Ended
Dec. 31, 2013
Pilots
Employee
Apr. 01, 2014
Subsequent Event [Line Items]    
Number of employees under a national master agreement and various supplemental agreements with local unions affiliated with Teamster 253,000  
number of agreements   2
Term of Agreement 5 years  
Number of supplemental agreements with local Teamster unions open 6  
Number of pilots under a collective bargaining agreement with the Independent Pilots Association 2,600