OTHER ASSETS AND LIABILITIES (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Other Assets [Abstract]
Derivative contracts	$ 154	$ 253
Intangible assets	151	155
Non-current investments	59	97
Other	149	121
Other assets	513	626
Accrued Liabilities, Current [Abstract]
Retirement plans	178	110
Aircraft rentals	85	57
Vacation pay	258	248
Health	60	56
Derivative contracts	33	85
Workers compensation	163	162
Deferred taxes	138	68
Other	227	210
Accrued liabilities	1,142	996
Other Liabilities, Noncurrent [Abstract]
Postretirement obligation	112	107
Non-current leasehold interest	292	311
Construction obligation	268	202
Other	273	290
Other non-current liabilities	$ 945	$ 910