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v3.19.1

Subsequent Events (Details) - USD ($) $ in Millions |  |  | 3 Months Ended
--- | --- | --- | ---
Apr. 18, 2019 | Apr. 09, 2019 | Mar. 31, 2019 | Mar. 31, 2018
Subsequent Event [Line Items] |  |  |  |
Proceeds from Divestiture of Businesses and Interests in Affiliates |  |  | $ 0 | $ 1,180
Gain (Loss) on Disposition of Business |  |  | $ (4) | $ 788
Alto Sertao III [Member] | Subsequent Event [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Asset Acquisition, Purchase Price |  | $ 130 |  |
Non-Recourse Debt |  | 250 |  |
sPower [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 50.00% |
sPower [Member] | Subsequent Event [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Equity Method Investment, Ownership Percentage Sold | 48.00% |  |  |
Proceeds from Sale of Equity Method Investments | $ 170 |  |  |
Equity Method Investment, Ownership Percentage | 26.00% |  |  |
Kilroot and Ballylumford [Member] | Subsequent Event [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Proceeds from Divestiture of Businesses and Interests in Affiliates |  | 120 |  |
Gain (Loss) on Disposition of Business |  | $ 200 |  |

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- Definition Equity Method Investment, Ownership Percentage Sold + References No definition available. + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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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. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684 + Details
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- Definition 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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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