OTHER ASSETS AND LIABILITIES (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Other Assets [Abstract]
Derivative contracts	$ 294	$ 253
Intangible assets	144	155
Non-current investments	42	97
Other	139	121
Other assets	619	626
Accrued Liabilities, Current [Abstract]
Retirement plans	114	110
Aircraft rentals	105	57
Vacation pay	263	248
Health	60	56
Derivative contracts	90	85
Workers compensation	155	162
Deferred taxes	61	68
Other	192	210
Accrued liabilities	1,040	996
Other Liabilities, Noncurrent [Abstract]
Postretirement obligation	116	107
Non-current lease-related obligations	419	311
Construction obligation	304	202
Other	275	290
Other non-current liabilities	$ 1,114	$ 910