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Variable Interest Entities (Narrative) (Details) $ in Millions | 1 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) MW | Dec. 31, 2021 USD ($)
Variable Interest Entity [Line Items] |  |  |
Investments | $ 69 | $ 69 | $ 71
NWO Holdco, L.L.C |  |  |
Variable Interest Entity [Line Items] |  |  |
Sale of noncontrolling interest | $ 49 |  |
Nameplate capacity (in MW) | MW |  | 105 |
Variable Interest Entity, Primary Beneficiary | Aviator Wind |  |  |
Variable Interest Entity [Line Items] |  |  |
Nameplate capacity (in MW) | MW |  | 525 |
Ownership interest |  | 51.00% |
Variable Interest Entity, Primary Beneficiary | Aviator Wind Class B Membership |  |  |
Variable Interest Entity [Line Items] |  |  |
Noncontrolling ownership interest | 49.00% | 49.00% |
Variable Interest Entity, Not Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Investments | $ 69 | $ 69 | $ 71
Variable Interest Entity, Not Primary Beneficiary | T.E.S. Filer City |  |  |
Variable Interest Entity [Line Items] |  |  |
Ownership interest |  | 50.00% |
Variable Interest Entity, Not Primary Beneficiary | Grayling |  |  |
Variable Interest Entity [Line Items] |  |  |
Ownership interest |  | 50.00% |
Variable Interest Entity, Not Primary Beneficiary | Genesee |  |  |
Variable Interest Entity [Line Items] |  |  |
Ownership interest |  | 50.00% |
Variable Interest Entity, Not Primary Beneficiary | Craven |  |  |
Variable Interest Entity [Line Items] |  |  |
Ownership interest |  | 50.00% |

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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(10)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8813-108599 + Details
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- Definition The cash inflow associated with the deconsolidation of a previously consolidated subsidiary or sale of an entity that is related to it but not strictly controlled. + 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 https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585 + Details
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- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=123419778&loc=SL6759159-111685 + Details
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