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Non-Derivative Fair Value Measurements (Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair value measurements made on a recurring basis [Member] |  |
Cash equivalents: |  |
Equity securities | $ 1,456 | $ 1,972
Special use funds: |  |
Equity securities | 6,077 | 5,290
U.S. Government and municipal bonds | 766 | 757
Corporate debt securities | 655 | 623
Asset-backed securities | 905 | 822
Other debt securities | 15 | 20
Other investments: |  |
Equity Securities | 52 | 50
U.S. Government and Municipal Bonds | 192 | 291
Corporate Debt Securities | 873 | 523
Other Debt Securities | 340 | 211
Level 1 | Fair value measurements made on a recurring basis [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring [Line Items] |  |
Restricted cash | 108 | 34
Cash equivalents: |  |
Equity securities | 1,456 | 1,972
Special use funds: |  |
Equity securities | 2,626 | 2,349
U.S. Government and municipal bonds | 703 | 700
Corporate debt securities | 2 | 3
Asset-backed securities | 0 | 0
Other debt securities | 0 | 6
Other investments: |  |
Equity Securities | 51 | 50
U.S. Government and Municipal Bonds | 189 | 288
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 | 3,246 | 2,742
U.S. Government and municipal bonds | 63 | 57
Corporate debt securities | 653 | 620
Asset-backed securities | 905 | 822
Other debt securities | 15 | 14
Other investments: |  |
Equity Securities | 1 | 0
U.S. Government and Municipal Bonds | 3 | 3
Corporate Debt Securities | 731 | 408
Other Debt Securities | 287 | 196
Level 3 | Fair value measurements made on a recurring basis [Member] |  |
Cash equivalents: |  |
Equity securities | 0 | 0
Special use funds: |  |
Equity securities | 205 | 199
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 | 142 | 115
Other Debt Securities | 53 | 15
Florida Power & Light Company | Fair value measurements made on a recurring basis [Member] |  |
Cash equivalents: |  |
Equity securities | 113 | 12
Special use funds: |  |
Equity securities | 4,133 | 3,536
U.S. Government and municipal bonds | 602 | 583
Corporate debt securities | 479 | 458
Asset-backed securities | 684 | 606
Other debt securities | 9 | 11
Other investments: |  |
Equity Securities | 9 | 9
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 | 100 | 11
Cash equivalents: |  |
Equity securities | 113 | 12
Special use funds: |  |
Equity securities | 1,009 | 863
U.S. Government and municipal bonds | 561 | 556
Corporate debt securities | 1 | 3
Asset-backed securities | 0 | 0
Other debt securities | 0 | 5
Other investments: |  |
Equity Securities | 9 | 9
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 | 2,919 | 2,474
U.S. Government and municipal bonds | 41 | 27
Corporate debt securities | 478 | 455
Asset-backed securities | 684 | 606
Other debt securities | 9 | 6
Other investments: |  |
Equity Securities | 0 | 0
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 | 205 | 199
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
NextEra Energy Transmission, LLC Subsidiary [Member] |  |
Other investments: |  |
Contingent consideration liabilities | $ 126 | $ 126

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