Percentage of equity interest in business disposed.

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[Line Items] for Income Tax Disclosures [Table]

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No definition available.

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Income Tax Expense (Benefit), due to Foreign Currency Exposure [Line Items]

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No definition available.

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- Definition

Tax on gain (loss) on disposition of business

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No definition available.

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

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

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- Definition

Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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

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The cash inflow associated with the amount received from the sale of a business segment or subsidiary or sale of an entity that is related to it but not strictly controlled during the period (for example, an unconsolidated subsidiary, affiliate, joint venture or equity method investment).

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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Mar. 20, 2018
Income Tax Disclosures [Line Items]
One-time Transition Tax Rate	$ (146)		$ (93)	$ (509)	$ (246)
Gain (Loss) on Disposition of Business	$ 21		$ 1	$ (856)	$ 49
Effective Income Tax Rate Reconciliation, Percent	44.00%		31.00%	30.00%	36.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%	35.00%
Proceeds from Divestiture of Businesses and Interests in Affiliates				$ 1,796	$ 39
Electrica Santiago (Gener ESSA) [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Income Tax Disclosures [Line Items]
Gain (Loss) on Disposition of Business				(69)
Tax on gain (loss) on disposition of business		$ 25
Proceeds from Divestiture of Businesses and Interests in Affiliates				287
Masinloc Subsidiary [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Income Tax Disclosures [Line Items]
Gain (Loss) on Disposition of Business				(773)
Tax on gain (loss) on disposition of business				155
Proceeds from Divestiture of Businesses and Interests in Affiliates				1,050
Argentina [Member]
Income Tax Disclosures [Line Items]
Income Tax Expense (Benefit), due to Foreign Currency Exposure	$ 16		$ 4	38	$ 8
Masinloc Subsidiary [Member]
Income Tax Disclosures [Line Items]
Disposal Group Not Discontinued Operation Ownership Interest Sold						51.00%
UNITED STATES
Income Tax Disclosures [Line Items]
One-time Transition Tax Rate				(708)
Change in Accounting Estimate, Type [Domain] \| UNITED STATES
Income Tax Disclosures [Line Items]
One-time Transition Tax Rate				$ (33)