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Non-Derivative Fair Value Measurements (Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022 | Jun. 30, 2021
--- | --- | --- | ---
Fair value measurements made on a recurring basis [Member] |  |  |
Cash equivalents: |  |  |
Equity securities | $ 758 | $ 961 |
Special use funds: |  |  |
Equity securities | 4,946 | 4,437 |
U.S. Government and municipal bonds | 630 | 704 |
Corporate debt securities | 672 | 722 |
Asset-backed securities | 830 | 615 |
Other debt securities | 16 | 20 |
Other investments: |  |  |
Equity Securities | 54 | 31 |
U.S. Government and Municipal Bonds | 294 | 235 |
Corporate Debt Securities | 435 | 233 |
Other Debt Securities | 256 | 67 |
Level 1 | Fair value measurements made on a recurring basis [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring [Line Items] |  |  |
Restricted cash | 19 | 69 |
Cash equivalents: |  |  |
Equity securities | 758 | 961 |
Special use funds: |  |  |
Equity securities | 2,207 | 2,062 |
U.S. Government and municipal bonds | 577 | 641 |
Corporate debt securities | 3 | 6 |
Asset-backed securities | 0 | 0 |
Other debt securities | 0 | 1 |
Other investments: |  |  |
Equity Securities | 54 | 30 |
U.S. Government and Municipal Bonds | 291 | 117 |
Corporate Debt Securities | 0 | 0 |
Other Debt Securities | 0 | 0 |
Level 2 | Fair value measurements made on a recurring basis [Member] |  |  |
Cash equivalents: |  |  |
Equity securities | 0 | 0 |
Special use funds: |  |  |
Equity securities | 2,739 | 2,375 |
U.S. Government and municipal bonds | 53 | 63 |
Corporate debt securities | 669 | 716 |
Asset-backed securities | 830 | 615 |
Other debt securities | 16 | 19 |
Other investments: |  |  |
Equity Securities | 0 | 1 |
U.S. Government and Municipal Bonds | 3 | 118 |
Corporate Debt Securities | 312 | 125 |
Other Debt Securities | 244 | 57 |
Level 3 | Fair value measurements made on a recurring basis [Member] |  |  |
Cash equivalents: |  |  |
Equity securities | 0 | 0 |
Special use funds: |  |  |
Equity securities | 0 | 0 |
U.S. Government and municipal bonds | 0 | 0 |
Corporate debt securities | 0 | 0 |
Asset-backed securities | 0 | 0 |
Other debt securities | 0 | 0 |
Other investments: |  |  |
Equity Securities | 0 | 0 |
U.S. Government and Municipal Bonds | 0 | 0 |
Corporate Debt Securities | 123 | 108 |
Other Debt Securities | 12 | 10 |
Florida Power & Light Company | Fair value measurements made on a recurring basis [Member] |  |  |
Cash equivalents: |  |  |
Equity securities | 33 | 36 |
Special use funds: |  |  |
Equity securities | 3,295 | 2,905 |
U.S. Government and municipal bonds | 475 | 534 |
Corporate debt securities | 492 | 553 |
Asset-backed securities | 643 | 473 |
Other debt securities | 8 | 12 |
Other investments: |  |  |
Equity Securities | 10 | 9 |
Other Debt Securities |  | 114 |
Florida Power & Light Company | Level 1 | Fair value measurements made on a recurring basis [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring [Line Items] |  |  |
Restricted cash | 12 | 33 |
Cash equivalents: |  |  |
Equity securities | 33 | 36 |
Special use funds: |  |  |
Equity securities | 804 | 743 |
U.S. Government and municipal bonds | 454 | 505 |
Corporate debt securities | 2 | 6 |
Asset-backed securities | 0 | 0 |
Other debt securities | 0 | 1 |
Other investments: |  |  |
Equity Securities | 10 | 9 |
Other Debt Securities |  | 0 |
Florida Power & Light Company | Level 2 | Fair value measurements made on a recurring basis [Member] |  |  |
Cash equivalents: |  |  |
Equity securities | 0 | 0 |
Special use funds: |  |  |
Equity securities | 2,491 | 2,162 |
U.S. Government and municipal bonds | 21 | 29 |
Corporate debt securities | 490 | 547 |
Asset-backed securities | 643 | 473 |
Other debt securities | 8 | 11 |
Other investments: |  |  |
Equity Securities | 0 | 0 |
Other Debt Securities |  | 114 |
Florida Power & Light Company | Level 3 | Fair value measurements made on a recurring basis [Member] |  |  |
Cash equivalents: |  |  |
Equity securities | 0 | 0 |
Special use funds: |  |  |
Equity securities | 0 | 0 |
U.S. Government and municipal bonds | 0 | 0 |
Corporate debt securities | 0 | 0 |
Asset-backed securities | 0 | 0 |
Other debt securities | 0 | 0 |
Other investments: |  |  |
Equity Securities | 0 | 0 |
Other Debt Securities |  | 0 |
NextEra Energy Transmission, LLC Subsidiary [Member] |  |  |
Other investments: |  |  |
Contingent consideration liabilities | $ 130 | $ 203 |
NextEra Energy Transmission, LLC Subsidiary [Member] | GridLiance [Member] |  |  |
Other investments: |  |  |
Contingent consideration liabilities |  |  | $ 264

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