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Merger and Related Matters - Additional Information (Detail)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 09, 2013
USD ($)
Ratio
$ / shares
Dec. 31, 2014
USD ($)
Slot
Dec. 31, 2013
USD ($)
Business Acquisition [Line Items]      
Net proceeds from slot transaction   $ 307  
Gain related to sale   309 $ 67
Non-cash charge   43  
Exchange price per share | $ / shares $ 22.55    
Exchange ratio | Ratio 1.0    
US Airways Group [Member]      
Business Acquisition [Line Items]      
Exchange price per share | $ / shares $ 22.55    
Exchange ratio | Ratio 1.0    
Business combination, consideration transferred $ 4,592    
American Airlines, Inc. [Member]      
Business Acquisition [Line Items]      
Net proceeds from slot transaction   307  
Gain related to sale   309 67
Non-cash charge   $ 43  
Exchange price per share | $ / shares $ 22.55    
Exchange ratio | Ratio 1    
American Airlines, Inc. [Member] | US Airways Group [Member]      
Business Acquisition [Line Items]      
Exchange price per share | $ / shares $ 22.55    
Exchange ratio | Ratio 1.0    
Business combination, consideration transferred $ 5,431    
John F. Kennedy Airport [Member]      
Business Acquisition [Line Items]      
Number of slots sold | Slot   24  
John F. Kennedy Airport [Member] | American Airlines, Inc. [Member]      
Business Acquisition [Line Items]      
Number of slots sold | Slot   24  
Washington Reagan National Airport [Member]      
Business Acquisition [Line Items]      
Gain related to sale   $ 309  
Washington Reagan National Airport [Member] | American Airlines, Inc. [Member]      
Business Acquisition [Line Items]      
Gain related to sale   $ 309  
LaGuardia Airport Slots [Member]      
Business Acquisition [Line Items]      
Gain related to sale     67
LaGuardia Airport Slots [Member] | American Airlines, Inc. [Member]      
Business Acquisition [Line Items]      
Gain related to sale     $ 67