LEASES (Details) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
	Jan. 01, 2019	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Operating Lease Cost		$ 5	$ 11
Short-term Lease Cost		7	14
Variable Lease, Cost		2	2
Finance Lease, Right-of-Use Asset, Amortization		1	1
Lease, Cost		15	28
Operating Lease, Payments			11
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 99		105
Operating lease right-of-use assets		95	95	$ 0
Finance Lease, Right-of-Use Asset		12	12
Finance Lease, Right-of-Use Asset, Amortization			6
Total Lease Assets		101	101
Operating lease liabilities - current		17	17	0
Finance Lease, Liability, Current		1	1
Operating lease liabilities - noncurrent		78	78	0
Finance Lease, Liability, Noncurrent		5	5
Total Lease Liabilities		$ 101	$ 101
Operating Lease, Weighted Average Remaining Lease Term		6 years 7 months	6 years 7 months
Finance Lease, Weighted Average Remaining Lease Term		5 years	5 years
Operating Lease, Weighted Average Discount Rate, Percent		4.26%	4.26%
Finance Lease, Weighted Average Discount Rate, Percent		4.22%	4.22%
Lessee, Operating Lease, Liability, Payments, Remainder of 2019		$ 11	$ 11
Finance Lease, Liability, Payments, Due 2019		1	1
Lessee, Operating Lease, Liability, Payments, Due 2020		19	19
Finance Lease, Liability, Payments, Due 2020		1	1
Lessee, Operating Lease, Liability, Payments, Due 2021		16	16
Finance Lease, Liability, Payments, Due 2021		1	1
Lessee, Operating Lease, Liability, Payments, Due 2022		14	14
Finance Lease, Liability, Payments, Due 2022		2	2
Lessee, Operating Lease, Liability, Payments, Due 2023		13	13
Finance Lease, Liability, Payments, Due 2023		1	1
Lessee, Operating Lease, Liability, Payments, Due 2024 and thereafter		36	36
Finance Lease, Liability, Payments, Due 2024 and thereafter		1	1
Lessee, Operating Lease, Liability, Payments, Due		109	109
Finance Lease, Liability, Payments, Due		7	7
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		14	14
Finance Lease, Liability, Undiscounted Excess Amount		1	1
Operating Lease, Liability		95	95
Finance Lease, Liability		6	6
Lessee, Additional Leases Not yet Commenced, Assumptions and Judgment, Amount		$ 5	$ 5
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract		10 years
Lessee, Operating Lease, Liability, Payments, Due 2019				18
Operating Leases, Future Minimum Payments, Due 2020				16
Operating Leases, Future Minimum Payments, Due 2021				14
Operating Leases, Future Minimum Payments, Due 2022				13
Operating Leases, Future Minimum Payments, Due 2023				13
Operating Leases, Future Minimum Payments, Due 2024 and thereafter				37
Operating Leases, Future Minimum Payments Due				$ 111
Minimum [Member]
Lessee, Operating and Finance Leases, Remaining Lease Term			1 year
Maximum [Member]
Lessee, Operating and Finance Leases, Remaining Lease Term			10 years