INCOME TAXES - COMPONENTS OF INCOME TAX EXPENSE, RECONCILIATION, AND DEFERRED TAX ASSETS AND LIABILITIES (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) item	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Non-U.K.
Current	$ 30	$ (9)	$ (6)
Deferred	20	(14)	(28)
Total income tax expense (benefit)	50	(23)	(34)
Reconciliation between the U.S. federal income taxes at the U.S. statutory rate to the provision (benefit) for income taxes
Income (loss) from continuing operations before income taxes	186	(108)	(396)
Expected tax expense (benefit) at U.K. statutory rate of 19%, 20% and 20.25% for the years 2017, 2016 and 2015, respectively	35	(22)	(80)
Change resulting from:
Non-U.K. tax rate differentials	(1)	(19)	(37)
Other non-U.K. tax effects, including nondeductible expense, tax effect of rate changes, transfer pricing adjustments and various withholding taxes		(7)	7
Non-taxable portion of gain on sale of businesses		(3)
Unrealized currency exchange gains and losses	7	1	(21)
Tax authority audits and dispute resolutions	1	(1)	4
Tax benefit of losses with valuation allowances as a result of other comprehensive income		(1)	(1)
Change in valuation allowance	3	27	96
Effects of U.S. income tax reform	3
Other, net	2	2	(2)
Total income tax expense (benefit)	$ 50	$ (23)	$ (34)
Income tax statutory rate (as a percent)	19.00%	20.00%	20.25%
Number of non-U.S. tax jurisdictions in which the entity is operating | item	25
Tax benefit from foreign exchange transactions			$ 11
Expense related to establishing contingent liabilities for potential non deductibility of the foreign currency losses			10
Component of income (loss) from continuing operations before income taxes
U.K.	$ 76	$ (20)	(90)
Non-U.K.	110	(88)	(306)
Income (loss) from continuing operations before income taxes	186	(108)	$ (396)
Deferred income tax assets:
Net operating loss carryforwards	325	365
Pension and other employee compensation	50	58
Property, plant and equipment	47	28
Intangible assets	13	19
Other, net	41	36
Total	476	506
Deferred income tax liabilities:
Property, plant and equipment	(55)	(126)
Pension and other employee compensation		(1)
Other, net	(1)	(4)
Total	(56)	(131)
Net deferred tax asset before valuation allowance	420	375
Valuation allowance	(253)	(245)
Net deferred tax asset	167	130
Non-current deferred tax asset	167	142
Non-current deferred tax liability		(12)
Net deferred tax asset	$ 167	$ 130