ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income Loss [Abstract]
Cumulative foreign exchange translation adjustment	$ (1,892,000,000)	$ (740,000,000)
Pension and other postretirement benefit adjustments	(644,000,000)	(728,000,000)
Fair value of available for sale investments	0	0
Fair value of effective cash flow hedges	1,000,000	9,000,000
Accumulated Other Comprehensive Income (Loss)	(2,535,000,000)	(1,459,000,000)	$ 818,000,000
Other Comprehensive Income Loss Before Tax Period Increase Decrease [Abstract]
Foreign exchange translation adjustment	(1,152,000,000)	(1,044,000,000)	(52,000,000)
Pension and other postretirement benefit adjustments	129,000,000	(1,707,000,000)	3,514,000,000
Changes in fair value of available for sale investments	0	(246,000,000)	30,000,000
Changes in fair value of effective cash flow hedges	(11,000,000)	24,000,000	(14,000,000)
Changes in accumulated other comprehensive income, pretax	(1,034,000,000)	(2,973,000,000)	3,478,000,000
Other Comprehensive Income Loss Tax [Abstract]
Foreign exchange translation adjustment	0	0	0
Pensions and other postretirement benefit adjustments	(45,000,000)	624,000,000	(1,311,000,000)
Changes in fair value of available for sale investments	0	76,000,000	(17,000,000)
Changes in fair value of effective cash flow hedges	3,000,000	(4,000,000)	7,000,000
Other comprehensive income (loss), tax	(42,000,000)	696,000,000	(1,321,000,000)
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease Abstract
Foreign exchange translation adjustment	(1,152,000,000)	(1,044,000,000)	(52,000,000)
Pensions and other postretirement benefit adjustments	84,000,000	(1,083,000,000)	2,203,000,000
Changes in fair value of available for sale investments	0	(170,000,000)	13,000,000
Changes in fair value of effective cash flow hedges	(8,000,000)	20,000,000	(7,000,000)
Components of other comprehensive income (loss), net of tax	$ (1,076,000,000)	$ (2,277,000,000)	$ 2,157,000,000