ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Other Comprehensive Income (Loss), Net of Tax	$ 14	$ 18	$ 29	$ 34
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,532)	(1,572)	(1,532)	(1,572)		$ (1,561)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(57)	(58)	(57)	(58)	$ (57)	(57)	$ (59)	$ (59)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Other Comprehensive Income (Loss), Net of Tax	14	17	29	33
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	19	21	38	43
Reclassification from AOCI, Current Period, Tax	(5)	(4)	(9)	(10)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,475)	(1,514)	(1,475)	(1,514)	$ (1,489)	$ (1,504)	$ (1,277)	$ (1,293)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	1	0	1
Retained Earnings [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 0	$ (254)	$ 0	$ (254)