Non-Derivative Fair Value Measurements (Assets and Liabilities Measured on a Recurring Basis) (Details) - Fair value measurements made on a recurring basis [Member] - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Cash equivalents:
Equity securities	$ 762	$ 677
Special use funds:
Equity securities	6,473	6,164
U.S. Government and municipal bonds	661	722
Corporate debt securities	727	685
Asset-backed securities	928	873
Other debt securities	19	14
Other investments:
Equity Securities	100	49
U.S. Government and Municipal Bonds	107	161
Corporate Debt Securities	1,178	869
Other Debt Securities	320	348
Level 1
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Restricted cash	45	109
Cash equivalents:
Equity securities	762	677
Special use funds:
Equity securities	2,776	2,614
U.S. Government and municipal bonds	596	663
Corporate debt securities	8	5
Asset-backed securities	0	0
Other debt securities	2	0
Other investments:
Equity Securities	48	48
U.S. Government and Municipal Bonds	104	158
Corporate Debt Securities	0	0
Other Debt Securities	0	0
Level 2
Cash equivalents:
Equity securities	0	0
Special use funds:
Equity securities	3,468	3,321
U.S. Government and municipal bonds	65	59
Corporate debt securities	719	680
Asset-backed securities	928	873
Other debt securities	17	14
Other investments:
Equity Securities	1	1
U.S. Government and Municipal Bonds	3	3
Corporate Debt Securities	1,057	758
Other Debt Securities	283	295
Level 3
Cash equivalents:
Equity securities	0	0
Special use funds:
Equity securities	229	229
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	51	0
U.S. Government and Municipal Bonds	0	0
Corporate Debt Securities	121	111
Other Debt Securities	37	53
Florida Power & Light Company
Cash equivalents:
Equity securities	40	101
Special use funds:
Equity securities	4,457	4,219
U.S. Government and municipal bonds	536	561
Corporate debt securities	539	510
Asset-backed securities	708	660
Other debt securities	12	10
Other investments:
Equity Securities	7	8
Florida Power & Light Company | Level 1
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Restricted cash	36	101
Cash equivalents:
Equity securities	40	101
Special use funds:
Equity securities	1,097	1,028
U.S. Government and municipal bonds	491	522
Corporate debt securities	8	4
Asset-backed securities	0	0
Other debt securities	2	0
Other investments:
Equity Securities	7	8
Florida Power & Light Company | Level 2
Cash equivalents:
Equity securities	0	0
Special use funds:
Equity securities	3,156	2,987
U.S. Government and municipal bonds	45	39
Corporate debt securities	531	506
Asset-backed securities	708	660
Other debt securities	10	10
Other investments:
Equity Securities	0	0
Florida Power & Light Company | Level 3
Cash equivalents:
Equity securities	0	0
Special use funds:
Equity securities	204	204
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