Deferred Tax Liability, Toll Tax Accrued

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Disposal Group, Not Discontinued Operation, Percentage Sold

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- Definition

Income Tax, Installment Period

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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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 increase (decrease) in the income tax rates.

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- Definition

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	3 Months Ended		9 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Mar. 14, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Toll tax accrued	$ 16		$ 16			$ 268
Discrete tax benefit	$ (59)	$ 93	(44)	$ 917
One-time Deemed Repatriation
Operating Loss Carryforwards [Line Items]
Tax benefit from foreign tax credits			$ 252
Installment period			8 years
Expense related to tax rate change adjustment			$ 107
Discrete tax benefit			$ 145
Tamar and Dalit Fields \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Operating Loss Carryforwards [Line Items]
Percentage of divestiture farmed out	7.50%		7.50%		7.50%