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Non-Derivative Fair Value Measurements (Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring [Line Items] |  |
Restricted cash | $ 1,261 | $ 677
Fair value measurements made on a recurring basis [Member] |  |
Cash equivalents: |  |
Equity securities | 548 | 176
Special use funds: |  |
Equity securities | 5,284 | 5,511
U.S. Government and municipal bonds | 784 | 845
Corporate debt securities | 858 | 962
Asset-backed securities | 635 | 663
Other debt securities | 37 | 35
Other investments: |  |
Equity Securities | 69 | 72
Debt securities | 328 | 285
Level 1 | Fair value measurements made on a recurring basis [Member] |  |
Cash equivalents: |  |
Equity securities | 548 | 176
Special use funds: |  |
Equity securities | 2,414 | 2,538
U.S. Government and municipal bonds | 728 | 770
Corporate debt securities | 1 | 7
Asset-backed securities | 0 | 0
Other debt securities | 2 | 2
Other investments: |  |
Equity Securities | 67 | 70
Debt securities | 105 | 111
Level 2 | Fair value measurements made on a recurring basis [Member] |  |
Cash equivalents: |  |
Equity securities | 0 | 0
Special use funds: |  |
Equity securities | 2,870 | 2,973
U.S. Government and municipal bonds | 56 | 75
Corporate debt securities | 857 | 955
Asset-backed securities | 635 | 663
Other debt securities | 35 | 33
Other investments: |  |
Equity Securities | 2 | 2
Debt securities | 186 | 162
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
Debt securities | 37 | 12
Current other assets | Level 1 | Fair value measurements made on a recurring basis [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring [Line Items] |  |
Restricted cash | 52 | 56
Florida Power & Light Company |  |
Fair Value, Assets and Liabilities Measured on Recurring [Line Items] |  |
Restricted cash | 45 | 53
Florida Power & Light Company | Fair value measurements made on a recurring basis [Member] |  |
Cash equivalents: |  |
Equity securities | 46 | 58
Special use funds: |  |
Equity securities | 3,435 | 3,552
U.S. Government and municipal bonds | 626 | 668
Corporate debt securities | 634 | 726
Asset-backed securities | 499 | 515
Other debt securities | 26 | 25
Other investments: |  |
Equity Securities | 14 | 13
Florida Power & Light Company | Level 1 | Fair value measurements made on a recurring basis [Member] |  |
Cash equivalents: |  |
Equity securities | 46 | 58
Special use funds: |  |
Equity securities | 833 | 862
U.S. Government and municipal bonds | 597 | 624
Corporate debt securities | 0 | 6
Asset-backed securities | 0 | 0
Other debt securities | 2 | 2
Other investments: |  |
Equity Securities | 14 | 13
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 | 2,602 | 2,690
U.S. Government and municipal bonds | 29 | 44
Corporate debt securities | 634 | 720
Asset-backed securities | 499 | 515
Other debt securities | 24 | 23
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 | 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
Florida Power & Light Company | Current other assets | Level 1 | Fair value measurements made on a recurring basis [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring [Line Items] |  |
Restricted cash | 44 | $ 53
NextEra Energy Resources |  |
Other investments: |  |
Contingent consideration liabilities | $ 245 |

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