Supplemental Cash Flow Information

6 Months Ended

Jun. 30, 2021

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

Supplemental Cash Flow Information

	Six Months Ended June 30,
(In millions)	2021		2020
Included in operating activities:
Interest paid, net of amounts capitalized	$	123	$	126
Income taxes paid to (received from) taxing authorities, net of refunds (a)	$	9	$	4
Noncash investing activities:
Increase (decrease) in asset retirement costs	$	38	$	(6)

(a)The six months ended June 30, 2020 includes $4 million related to tax refunds.

    Other noncash investing activities include accrued capital expenditures for the six months ended June 30, 2021 and 2020 of $85 million and $48 million, respectively.