OTHER ASSETS AND LIABILITIES, AND OTHER OPERATING EXPENSES (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Other Assets [Abstract]
Derivative contracts	$ 306	$ 253
Intangible assets	138	155
Non-current investments	41	97
Other	148	121
Other assets	633	626
Accrued Liabilities, Current [Abstract]
Retirement plans	135	110
Aircraft rentals	139	57
Vacation pay	270	248
Health	70	56
Derivative contracts	50	85
Workers compensation	159	162
Deferred taxes	67	69
Other	212	209
Accrued liabilities	1,102	996
Other Liabilities, Noncurrent [Abstract]
Postretirement obligation	148	107
Non-current leasehold interest	376	311
Construction obligation	331	202
Other deferred compensation	141	125
Other	128	165
Other non-current liabilities	$ 1,124	$ 910