Impairments (Tables)

6 Months Ended

Jun. 30, 2020

Impairment Expense [Abstract]

Fair Value Measurements, Nonrecurring

The following table summarizes impairment charges of proved properties, goodwill and equity method investments and their corresponding fair values.

	Three Months Ended June 30,
	2020				2019
(In millions)	Fair Value		Impairment		Fair Value		Impairment
Long-lived assets held for use	$	—	$	—	$	19	$	18
Equity method investment	$	142	$	152	N/A		$	—

	Six Months Ended June 30,
	2020				2019
(In millions)	Fair Value		Impairment		Fair Value		Impairment
Long-lived assets held for use	$	—	$	2	$	56	$	24
Goodwill	$	—	$	95	N/A		$	—
Equity method investment	$	142	$	152	N/A		$	—