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Variable Interest Entities - Additional Information (Details) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 MW | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Variable Interest Entity [Line Items] |  |  |
Noncontrolling interest |  | $ 218 | $ 191
Texas Solar 4 | Variable Interest Entity, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Generating capacity (MW AC) | MW | 40 |  |
Texas Solar 4 | Con Edison Development | Variable Interest Entity, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Percentage of variable interests (less than) | 80.00% |  |
Ownership percentage acquired |  | 20.00% |
Tax Equity Projects | Variable Interest Entity, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Income (loss) |  | $ (6) | (64)
Income (loss), after tax |  | $ (4) | (48)
Tax Equity Projects | Con Edison Development | Variable Interest Entity, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Percentage of variable interests (less than) |  | 100.00% |
Tax Equity Projects | Tax Equity Investors | Variable Interest Entity, Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Income (loss) |  | $ 44 | 98
Income (loss), after tax |  | $ 32 | $ 74

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(24)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.31) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(22)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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