LEASES (Details) - USD ($) $ in Millions		3 Months Ended
	Jan. 01, 2019	Mar. 31, 2019	Dec. 31, 2018
Operating Lease, Expense		$ 6
Short-term Lease, Cost		7
Lease, Cost		13
Operating Lease, Payments		6
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 99	104
Operating lease right-of-use assets		100	$ 0
Finance Lease, Right-of-Use Asset		12
Finance Lease, Right-of-Use Asset, Amortization		5
Total Lease Assets		107
Operating lease liabilities - current		18	0
Finance Lease, Liability, Current		1
Operating lease liabilities - noncurrent		82	0
Finance Lease, Liability, Noncurrent		6
Total Lease Liabilities		$ 107
Operating Lease, Weighted Average Remaining Lease Term		6 years 11 months
Finance Lease, Weighted Average Remaining Lease Term		5 years 3 months
Operating Lease, Weighted Average Discount Rate, Percent		4.28%
Finance Lease, Weighted Average Discount Rate, Percent		4.22%
Lessee, Operating Lease, Liability, Payments, Remainder of 2019		$ 16
Finance Lease, Liability, Payments, Due 2019		1
Lessee, Operating Lease, Liability, Payments, Due 2020		19
Finance Lease, Liability, Payments, Due 2020		1
Lessee, Operating Lease, Liability, Payments, Due 2021		15
Finance Lease, Liability, Payments, Due 2021		1
Lessee, Operating Lease, Liability, Payments, Due 2022		14
Finance Lease, Liability, Payments, Due 2022		2
Lessee, Operating Lease, Liability, Payments, Due 2023		13
Finance Lease, Liability, Payments, Due 2023		2
Lessee, Operating Lease, Liability, Payments, Due 2024 and thereafter		37
Finance Lease, Liability, Payments, Due 2024 and thereafter		1
Lessee, Operating Lease, Liability, Payments, Due		114
Finance Lease, Liability, Payments, Due		8
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		14
Finance Lease, Liability, Undiscounted Excess Amount		1
Operating Lease, Liability		100
Finance Lease, Liability		7
Lessee, Additional Leases Not yet Commenced, Assumptions and Judgment, Amount		$ 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		11 years