Supplemental Cash Flows Information (Tables)

3 Months Ended

Mar. 31, 2018

Supplemental Cash Flow Information [Abstract]

Supplemental Cash Flows Information Schedule (Table)

The following table presents information about investing and financing activities that affect recognized assets and liabilities but do not result in cash receipts or payments for the indicated periods.

	Three Months Ended   March 31,
	2018			2017
	(In millions)
Non-cash investing and financing activities excluded from the statement of cash flows:
(Increase) decrease in accrued capital expenditures	$	(13	)	$	(4	)
(Increase) decrease in asset retirement costs	(1		)	(4		)