Discontinued Operations (Amounts Reported as Discontinued Operations in the Consolidated Statements of Comprehensive Earnings) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2020
Discontinued Operations And Disposal Groups [Abstract]
Oil, gas and NGL sales	$ 77	$ 169
Total revenues	77	169
Production expenses	74	148
Asset impairment charges		179
Asset dispositions	(2)	(2)
General and administrative expenses		1
Financing costs, net		(2)
Other, net	(4)	(7)
Total expenses	68	317
Earnings (loss) from discontinued operations before income taxes	9	(148)
Income tax expense (benefit)		(32)
Net earnings (loss) from discontinued operations, net of tax	$ 9	$ (116)

Disposal group including discontinued operation asset impairment charges.

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Amount of financing costs, net, attributable to disposal group, including, but not limited to, discontinued operation.

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Disposal group including discontinued operation other expenses.

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Disposal group including discontinued operation production expenses.

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Disposal group including discontinued operation total expenses.

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Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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