EMPLOYEE BENEFITS - Fair Value of Plan Assets (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Cash and money market funds
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		$ 12
U.S. government obligations
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		5	$ 8
Non-U.S. government obligations
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		1	2
Municipal obligations
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		1	1
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		99	102
Asset-backed securities
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value			1
Bank loans
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		1
Level 1
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		17	0
Level 1 | Cash and money market funds
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		12
Level 1 | U.S. government obligations
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		5	0
Level 1 | Non-U.S. government obligations
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		0	0
Level 1 | Municipal obligations
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		0	0
Level 1 | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		0	0
Level 1 | Asset-backed securities
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value			0
Level 1 | Bank loans
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		0
Level 2
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		102	114
Level 2 | Cash and money market funds
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		0
Level 2 | U.S. government obligations
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		0	8
Level 2 | Non-U.S. government obligations
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		1	2
Level 2 | Municipal obligations
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		1	1
Level 2 | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		99	102
Level 2 | Asset-backed securities
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value			1
Level 2 | Bank loans
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		1
Level 3
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		0	0
Level 3 | Cash and money market funds
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		0
Level 3 | U.S. government obligations
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		0	0
Level 3 | Non-U.S. government obligations
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		0	0
Level 3 | Municipal obligations
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		0	0
Level 3 | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		0	0
Level 3 | Asset-backed securities
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value			0
Level 3 | Bank loans
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		0
Total
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		119	114
Investments Measured at Net Asset Value
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value	[1]	931	1,024
Investment
Defined Benefit Plan Disclosure [Line Items]
Assets at fair value		$ 1,050	$ 1,138

[1] Certain investments that were measured at net asset value per share (or its equivalent) have not been classified in the fair value hierarchy.