Non-Derivative Fair Value Measurements (Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Fair value measurements made on a recurring basis [Member]
Cash equivalents:
Equity securities	$ 736	$ 1,972
Special use funds:
Equity securities	5,783	5,290
U.S. Government and municipal bonds	681	757
Corporate debt securities	627	623
Asset-backed securities	920	822
Other debt securities	17	20
Other investments:
Equity Securities	53	50
U.S. Government and Municipal Bonds	238	291
Corporate Debt Securities	780	523
Other Debt Securities	305	211
Level 1 | Fair value measurements made on a recurring basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Restricted cash	122	34
Cash equivalents:
Equity securities	736	1,972
Special use funds:
Equity securities	2,518	2,349
U.S. Government and municipal bonds	624	700
Corporate debt securities	2	3
Asset-backed securities	0	0
Other debt securities	1	6
Other investments:
Equity Securities	52	50
U.S. Government and Municipal Bonds	235	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	3,064	2,742
U.S. Government and municipal bonds	57	57
Corporate debt securities	625	620
Asset-backed securities	920	822
Other debt securities	16	14
Other investments:
Equity Securities	1	0
U.S. Government and Municipal Bonds	3	3
Corporate Debt Securities	643	408
Other Debt Securities	257	196
Level 3 | Fair value measurements made on a recurring basis [Member]
Cash equivalents:
Equity securities	0	0
Special use funds:
Equity securities	201	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	137	115
Other Debt Securities	48	15
Florida Power & Light Company | Fair value measurements made on a recurring basis [Member]
Cash equivalents:
Equity securities	111	12
Special use funds:
Equity securities	3,925	3,536
U.S. Government and municipal bonds	525	583
Corporate debt securities	460	458
Asset-backed securities	702	606
Other debt securities	9	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	108	11
Cash equivalents:
Equity securities	111	12
Special use funds:
Equity securities	969	863
U.S. Government and municipal bonds	490	556
Corporate debt securities	2	3
Asset-backed securities	0	0
Other debt securities	1	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	2,755	2,474
U.S. Government and municipal bonds	35	27
Corporate debt securities	458	455
Asset-backed securities	702	606
Other debt securities	8	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	201	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