SUPPLEMENTARY INFORMATION Supplementary Information (Tables)

9 Months Ended

Sep. 30, 2019

Supplemental Cash Flow Elements [Abstract]

Schedule of Pass Through Costs

Pass through costs were as follows (in millions):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Pass through costs	$	12	$	12	$	37	$	38

Schedule of Other Operating Cost and Expense, by Component

We recorded insurance gains, as a reduction to Other operating expense, net, in our condensed consolidated statement of operations as follows (in millions):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Insurance gains for property and clean-up costs, net of impairment charges	$	—	$	—	$	—	$	7
Insurance gains for business interruption costs, net of costs incurred	$	—	$	—	$	—	$	8

Equity Method Investments [Table Text Block]

Summarized financial information of our significant equity method investments is presented as follows (in millions):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Statement of Operations:
Operating revenue	$	27	$	25	$	81	$	66
Operating income	$	7	$	7	$	23	$	19
Net income	$	2	$	2	$	9	$	6