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Non-Derivative Fair Value Measurements (Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair value measurements made on a recurring basis [Member] |  |
Cash equivalents: |  |
Equity securities | $ 684 | $ 1,972
Special use funds: |  |
Equity securities | 5,709 | 5,290
U.S. Government and municipal bonds | 735 | 757
Corporate debt securities | 643 | 623
Asset-backed securities | 825 | 822
Other debt securities | 14 | 20
Other investments: |  |
Equity Securities | 53 | 50
U.S. Government and Municipal Bonds | 249 | 291
Corporate Debt Securities | 628 | 523
Other Debt Securities | 230 | 211
Level 1 | Fair value measurements made on a recurring basis [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring [Line Items] |  |
Restricted cash | 19 | 34
Cash equivalents: |  |
Equity securities | 684 | 1,972
Special use funds: |  |
Equity securities | 2,494 | 2,349
U.S. Government and municipal bonds | 690 | 700
Corporate debt securities | 1 | 3
Asset-backed securities | 0 | 0
Other debt securities | 0 | 6
Other investments: |  |
Equity Securities | 52 | 50
U.S. Government and Municipal Bonds | 246 | 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 | 2,981 | 2,742
U.S. Government and municipal bonds | 45 | 57
Corporate debt securities | 642 | 620
Asset-backed securities | 825 | 822
Other debt securities | 14 | 14
Other investments: |  |
Equity Securities | 1 | 0
U.S. Government and Municipal Bonds | 3 | 3
Corporate Debt Securities | 494 | 408
Other Debt Securities | 191 | 196
Level 3 | Fair value measurements made on a recurring basis [Member] |  |
Cash equivalents: |  |
Equity securities | 0 | 0
Special use funds: |  |
Equity securities | 234 | 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 | 134 | 115
Other Debt Securities | 39 | 15
Florida Power & Light Company | Fair value measurements made on a recurring basis [Member] |  |
Cash equivalents: |  |
Equity securities | 11 | 12
Special use funds: |  |
Equity securities | 3,832 | 3,536
U.S. Government and municipal bonds | 573 | 583
Corporate debt securities | 468 | 458
Asset-backed securities | 607 | 606
Other debt securities | 6 | 11
Other investments: |  |
Equity Securities | 10 | 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 | 11 | 11
Cash equivalents: |  |
Equity securities | 11 | 12
Special use funds: |  |
Equity securities | 913 | 863
U.S. Government and municipal bonds | 550 | 556
Corporate debt securities | 0 | 3
Asset-backed securities | 0 | 0
Other debt securities | 0 | 5
Other investments: |  |
Equity Securities | 10 | 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 | 2,685 | 2,474
U.S. Government and municipal bonds | 23 | 27
Corporate debt securities | 468 | 455
Asset-backed securities | 607 | 606
Other debt securities | 6 | 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 | 234 | 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 | $ 125 | $ 126

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