ACCOUNTING POLICIES - Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Recently Issued Accounting Pronouncements
Net cash for financing activities	$ (577)	$ (1,109)	$ (521)
Net cash from operating activities	751	789	810
Accounting Standards Update 2016-09, Statutory Tax Withholding Component
Recently Issued Accounting Pronouncements
Net cash for financing activities		(63)	(111)
Net cash from operating activities		63	$ 111
Accounting Standards Update 2017-07
Recently Issued Accounting Pronouncements
Non-operating income (expense), expected to be adjusted	$ 26	$ 32