Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2019

Supplemental Cash Flow Information [Abstract]

Supplemental cash flow information

	Nine Months Ended September 30,
	2019		2018
	(in millions)
Cash payments for interest, net of amounts capitalized	$	400	$	400
Cash payments (receipts) for income taxes, net of refunds	58		(4		)