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LEASES (Tables)

3 Months Ended

Mar. 31, 2019

Schedule Of Lease Assets and Liabilities Recorded in Consolidated Balance Sheets [Table Text Block]



Millions of dollars		March 31, 2019
Lease assets:
Operating lease assets ⁽¹⁾		$	19
Finance lease assets ⁽²⁾		29
Total lease assets		$	48
Lease liabilities:
Operating lease - current ⁽³⁾		$	2
Operating lease - noncurrent ⁽⁴⁾		15
Finance lease - current ⁽⁵⁾		7
Finance lease - noncurrent ⁽⁶⁾		22
Total lease liabilities		$	46

Lease, Cost [Table Text Block]



Millions of dollars		Three Months Ended March 31, 2019
Finance lease cost:
Amortization		$	2
Interest		—
Operating lease cost		1
Short-term lease cost		—
Variable lease cost		—
Total lease cost		$	3

Summary of Cash Paid For Amounts Included In Measurement of Lease Liabilities In Consolidated Statements of Cash Flows [Table Text Block]



Millions of dollars		Three Months Ended March 31, 2019
Operating cash flows from finance leases		$	—
Operating cash flows from operating leases		1
Financing cash flows from finance leases		2

Summary of Weighted Average Remaining Lease Term And Discount Rate for Operating and Finance Leases [Table Text Block]



		March 31, 2019
Weighted average remaining lease term - finance leases		5 years
Weighted average remaining lease term - operating leases		23 years
Weighted average discount rate - finance leases		2.91	%
Weighted average discount rate - operating leases		4.22	%

Schedule of Maturity Analysis of Operating and Finance Lease Liabilities [Table Text Block]



Millions of dollars		Operating				Finance
2019		$	2			$	6
2020		1				7
2021		1				6
2022		1				4
2023		1				3
After 2023		23				5
Total undiscounted lease payments		29				31
Present value adjustment		(12		)		(2		)
Present value of lease liabilities		$	17			$	29