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Variable Interest Entities (Details) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2019 USD ($) variable_interest_entity electric_generation_facility equity_investment MW shares | Dec. 31, 2018 USD ($)
Variable Interest Entity [Line Items] |  |
Number of entities consolidated | variable_interest_entity | 12 |
Number of wind electric generation facilities owned and operated | electric_generation_facility | 20 |
Subsidiaries [Member] |  |
Variable Interest Entity [Line Items] |  |
Number of investments | equity_investment | 3 |
Generation facility capacity (mw) | MW | 277 |
Economic rights percentage | 100.00% |
NEP OpCo [Member] |  |
Variable Interest Entity [Line Items] |  |
Ownership interests percentage | 50.00% |
Noncurrent assets | $ 11 | $ 20
Noncurrent liabilities | $ 13 |
Class B Units, Series 1 [Member] | NextEra Energy Partners, LP [Member] | NEP OpCo [Member] |  |
Variable Interest Entity [Line Items] |  |
Number of units issued (in units) | shares | 1,000,000 |
Class B Units, Series 2 [Member] | NextEra Energy Partners, LP [Member] | NEP OpCo [Member] |  |
Variable Interest Entity [Line Items] |  |
Number of units issued (in units) | shares | 1,000,000 |
VIEs Wind And Solar [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |
Variable Interest Entity [Line Items] |  |
Assets | $ 4,850 | 4,937
Liabilities | 120 | 132
NEP Renewables, LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |
Variable Interest Entity [Line Items] |  |
Assets | 2,281 | 2,339
Liabilities | $ 94 | $ 89
NEP Renewables II, LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |
Variable Interest Entity [Line Items] |  |
Number of entities consolidated | variable_interest_entity | 2 |
Assets | $ 2,207 |
Liabilities | $ 326 |
NEP OpCo [Member] |  |
Variable Interest Entity [Line Items] |  |
Limited partner interest percentage | 37.50% |
Noncontrolling limited partner interest percentage | 62.50% |

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