Quarterly report pursuant to Section 13 or 15(d)

EMPLOYEE BENEFIT PLANS - Additional Information (Detail)

 v2.3.0.11
EMPLOYEE BENEFIT PLANS - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2011
Year
CreditFacility
Person
Dec. 31, 2010
Person
Jun. 30, 2011
Pension Plans, Defined Benefit
Jun. 30, 2011
Pension Plans, Defined Benefit
IBT Accelerated Contribution
Jun. 30, 2011
Pension Plans, Defined Benefit
IBT Accelerated Contribution Required After 2011
Mar. 31, 2011
Other Postretirement Benefit Plans, Defined Benefit
Jun. 30, 2011
Other Postretirement Benefit Plans, Defined Benefit
Jun. 30, 2011
International Pension Benefits
Jun. 30, 2011
U.S. Postretirement Medical Benefits
Defined Benefit Plan Disclosure [Line Items]                  
Amount contributed to company-sponsored benefit plans     $ 1,231 $ 1,200 $ 440   $ 65    
Early Retiree Reinsurance Program included in contribution to postretirement medical benefit plans           12      
Amount expect to contribute over the remainder of the year to the benefit plans               $ 24 $ 51
Number of employees under a national master agreement and various supplemental agreements with local unions affiliated with Teamsters   250,000              
Number of pilots under a collective bargaining agreement with the Independent Pilots Association 2,800                
Majority of ground mechanics not employed under agreements 3,300