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Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
AOCI tax, attributable to parent [Roll Forward]        
Beginning Balance, tax     $ (677)  
Amounts reclassified from accumulated other comprehensive income (loss), tax     15  
Net current-period other comprehensive income (loss), tax     15  
Ending Balance, tax $ (662)   (662)  
AOCI attributable to parent, net of tax [Roll Forward]        
Beginning Balance, net of tax     (5,083)  
Amounts reclassified from accumulated other comprehensive income (loss), net of tax (15) $ (16) (29) $ (32)
Net current-period other comprehensive income (loss), net of tax (15) (14) (29) (31)
Ending Balance, net of tax (5,112)   (5,112)  
American Airlines, Inc. [Member]        
AOCI tax, attributable to parent [Roll Forward]        
Beginning Balance, tax     (788)  
Amounts reclassified from accumulated other comprehensive income (loss), tax     15  
Net current-period other comprehensive income (loss), tax     15  
Ending Balance, tax (773)   (773)  
AOCI attributable to parent, net of tax [Roll Forward]        
Beginning Balance, net of tax     (5,182)  
Amounts reclassified from accumulated other comprehensive income (loss), net of tax (15) (16) (29) (32)
Net current-period other comprehensive income (loss), net of tax (15) $ (14) (29) $ (31)
Ending Balance, net of tax (5,211)   (5,211)  
Pension, Retiree Medical and Other Postretirement Benefits [Member]        
AOCI attributable to parent, before tax [Roll Forward]        
Beginning Balance, before tax     (4,406)  
Amounts reclassified from accumulated other comprehensive income (loss), before tax     (44)  
Net current-period other comprehensive income (loss), before tax     (44)  
Ending Balance, before tax (4,450)   (4,450)  
Pension, Retiree Medical and Other Postretirement Benefits [Member] | American Airlines, Inc. [Member]        
AOCI attributable to parent, before tax [Roll Forward]        
Beginning Balance, before tax     (4,394)  
Amounts reclassified from accumulated other comprehensive income (loss), before tax     (44)  
Net current-period other comprehensive income (loss), before tax     (44)  
Ending Balance, before tax $ (4,438)   $ (4,438)