Quarterly report pursuant to Section 13 or 15(d)

EMPLOYEE BENEFIT PLANS - Additional Information (Detail)

v3.5.0.2
EMPLOYEE BENEFIT PLANS - Additional Information (Detail)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
Employees
Jun. 30, 2015
USD ($)
Apr. 28, 2016
USD ($)
Dec. 31, 2015
USD ($)
Employees
Dec. 31, 2007
USD ($)
Defined Benefit Plan Disclosure [Line Items]            
Number of employees under a national master agreement and various supplemental agreements with local unions affiliated with Teamsters | Employees         266,000  
Remittance of retroactive economic benefits   $ 73 $ 179      
Majority of ground mechanics not employed under agreements | Employees   3,100        
Multiemployer Plans, Payment Term   46 years        
Number of pilots under a collective bargaining agreement with the Independent Pilots Association | Employees   2,600        
International Pension Benefits            
Defined Benefit Plan Disclosure [Line Items]            
Amount contributed to company- sponsored benefit plans   $ 44        
Estimated future employer contributions to defined benefit plan, current fiscal year   1.192        
U.S. Postretirement Medical Benefits            
Defined Benefit Plan Disclosure [Line Items]            
Amount contributed to company- sponsored benefit plans   $ 45        
Estimated future employer contributions to defined benefit plan, current fiscal year   56        
Multiemployer Plans, Pension [Member]            
Defined Benefit Plan Disclosure [Line Items]            
Multiemployer Plans, Withdrawal Obligation, Present Value   $ 869     $ 872  
Multi-employer Plans, Withdrawal Obligation, Fair Value Disclosure   $ 942     $ 841  
National Master Agreement (NMA) [Member]            
Defined Benefit Plan Disclosure [Line Items]            
Remittance of retroactive economic benefits $ 53          
Central States Pension Fund            
Defined Benefit Plan Disclosure [Line Items]            
Withdrawal liability           $ 6,100
Pension liability           $ 1,700
Minimum [Member]            
Defined Benefit Plan Disclosure [Line Items]            
Employer contribution percentage   3.00%        
Minimum [Member] | Central States Pension Fund            
Defined Benefit Plan Disclosure [Line Items]            
Pension liability       $ 3,200    
Maximum [Member]            
Defined Benefit Plan Disclosure [Line Items]            
Employer contribution percentage   8.00%        
Maximum [Member] | Central States Pension Fund            
Defined Benefit Plan Disclosure [Line Items]            
Pension liability       $ 3,800