LONG-TERM DEBT (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

Long-term debt obligations (in millions):

	2018			2017
Fixed-rate notes payable due through 2028	$	642		$	959
Variable-rate notes payable due through 2028	1,473			1,625
Less debt issuance costs	(12		)	(15		)
Total debt	2,103			2,569
Less current portion	486			307
Long-term debt, less current portion	$	1,617		$	2,262
Weighted-average fixed-interest rate	4.1		%	4.2		%
Weighted-average variable-interest rate	3.9		%	2.8		%

Schedule of Maturities of Long-term Debt [Table Text Block]

Long-term debt principal payments for the next five years and thereafter (in millions):

	Total
2019	$	488
2020	305
2021	263
2022	216
2023	262
Thereafter	579
Total principal payments	$	2,113