Deferred Tax Benefit, Repatriated Foreign Earnings

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Tax Cuts And Jobs Act Of 2017, Additional Taxable Income Recognized

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Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense

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Amount of deferred tax asset attributable to deductible temporary differences and carryforwards acquired at the acquisition date.

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Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date.

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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign tax credit.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Tax Credit Carryforward [Line Items]
Tax Cuts And Jobs Act Of 2017, Deferred tax benefit	$ 500
Tax Cuts And Jobs Act Of 2017, additional taxable income recognized	767
Foreign tax credits	164
AMT credit carryover	3
Operating loss carryforwards	3,200
Foreign loss carryforward	549
Estimated future US taxes on the eventual remittance of accumulated undistributed foreign subsidiary earnings	$ 240	$ 240
Federal Statutory Rate (in hundredths)	35.00%	35.00%	35.00%
Deferred Income Taxes	$ 1,227	$ 984	$ (116)
Clayton Williams Energy
Tax Credit Carryforward [Line Items]
Deferred tax liabilities	307
Deferred tax assets	450
Foreign Loss Carryforward
Tax Credit Carryforward [Line Items]
Foreign loss carryforward	183	$ 242
ISRAEL
Tax Credit Carryforward [Line Items]
Deferred Income Taxes	$ 12
ISRAEL \| Tax Year 2016
Tax Credit Carryforward [Line Items]
Federal Statutory Rate (in hundredths)	25.00%
ISRAEL \| Tax Year 2017
Tax Credit Carryforward [Line Items]
Federal Statutory Rate (in hundredths)	24.00%
ISRAEL \| Tax Year 2018
Tax Credit Carryforward [Line Items]
Federal Statutory Rate (in hundredths)	23.00%