Non-Derivative Fair Value Measurements (Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Restricted cash	$ 1,459	$ 677
Fair value measurements made on a recurring basis [Member]
Cash equivalents:
Equity securities	1,816	176
Special use funds:
Equity securities	4,147	5,511
U.S. Government and municipal bonds	704	845
Corporate debt securities	766	962
Asset-backed securities	608	663
Other debt securities	19	35
Other investments:
Equity Securities	32	72
Debt securities	440	285
Level 1 | Fair value measurements made on a recurring basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Restricted cash	55	56
Cash equivalents:
Equity securities	1,816	176
Special use funds:
Equity securities	1,932	2,538
U.S. Government and municipal bonds	642	770
Corporate debt securities	6	7
Asset-backed securities	0	0
Other debt securities	0	2
Other investments:
Equity Securities	31	70
Debt securities	125	111
Level 2 | Fair value measurements made on a recurring basis [Member]
Cash equivalents:
Equity securities	0	0
Special use funds:
Equity securities	2,215	2,973
U.S. Government and municipal bonds	62	75
Corporate debt securities	760	955
Asset-backed securities	608	663
Other debt securities	19	33
Other investments:
Equity Securities	1	2
Debt securities	191	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	124	12
Florida Power & Light Company
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Restricted cash	33	53
Florida Power & Light Company | Fair value measurements made on a recurring basis [Member]
Cash equivalents:
Equity securities	1,189	58
Special use funds:
Equity securities	2,725	3,552
U.S. Government and municipal bonds	552	668
Corporate debt securities	581	726
Asset-backed securities	475	515
Other debt securities	9	25
Other investments:
Equity Securities	10	13
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	33	53
Cash equivalents:
Equity securities	1,189	58
Special use funds:
Equity securities	710	862
U.S. Government and municipal bonds	520	624
Corporate debt securities	5	6
Asset-backed securities	0	0
Other debt securities	0	2
Other investments:
Equity Securities	10	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	2,015	2,690
U.S. Government and municipal bonds	32	44
Corporate debt securities	576	720
Asset-backed securities	475	515
Other debt securities	9	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
NextEra Energy Resources
Other investments:
Contingent consideration liabilities	$ 198