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Revenue Recognition (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | $ 5,000 | $ 4,000 |
Florida Power & Light Company |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 3,700 | 3,000 |
Unbilled revenues | 573 |  | $ 583
Revenue, remaining performance obligation | 385 |  |
NextEra Energy Resources |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Unrecognized revenue |  | $ 180 |
Revenue, remaining performance obligation | $ 1,300 |  |
Revenue Benchmark [Member] | Florida Power & Light Company | Customer Concentration Risk | Retail Customers |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Concentration risk, percentage | 90.00% |  |

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