DISPOSITIONS AND ACQUISITIONS (Net Income (Loss) from Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gain on sales of assets					$ 82	$ 70	$ 45	$ 11	$ 417	$ 208	$ 81
Net (loss) gain on disposal									3	(15)	57
Net (loss) income from discontinued operations	$ 1	$ 1	$ 0	$ 1	$ 4	$ (4)	$ (4)	$ (11)	3	(15)	66
Eliminations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net (loss) income from discontinued operations									0	0	0
TF Holdings Limited | Disposed of by Sale, Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) before income taxes and net (loss) gain on disposal									0	0	13
Net (loss) gain on disposal									3	(15)	57
Net (loss) income before income taxes									3	(15)	70
(Provision for) benefit from income taxes									0	0	(4)
Net (loss) income from discontinued operations									3	(15)	66
Chainge in fair value of contingent consideration									$ 3	$ (17)	$ 61