QUARTERLY OPERATIONS

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information [Text Block]

QUARTERLY FINANCIAL DATA (UNAUDITED):

The following table provides certain quarterly financial information for the periods presented:

	Quarters Ended
	March 31, 2019		June 30, 2019		September 30, 2019		December 31, 2019		Total
Operating revenues	$	158	$	139	$	135	$	146	$	578
Operating income	76		52		41		62		231
Net income	50		31		475		33		589
	Quarters Ended
	March 31, 2018		June 30, 2018		September 30, 2018		December 31, 2018		Total
Operating revenues	$	149	$	134	$	137	$	154	$	574
Operating income	64		42		41		56		203
Net income	34		22		23		29		108