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Organization and Basis of Presentation (Schedule of Cash Received and Allocated Losses from Subsidiaries, Noncontrolling Interest) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |
Cash received for the sale of noncontrolling interest to tax equity members | $ 239 | $ 7 | $ 402 | $ 200
Cash received for the sale of noncontrolling interest to pro rata share members | 0 | 0 | 0 | 415
Total Noncontrolling Interest Capital Contributions | 239 | 7 | 402 | 615
Allocated losses to noncontrolling tax equity members utilizing the HLBV method | 59 | 15 | 187 | 105
Allocated losses to noncontrolling members based on pro rata shares of ownership | 11 | 4 | 21 | 5
Total Noncontrolling Interest Allocated Losses | $ 70 | $ 19 | $ 208 | $ 110

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- Definition Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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