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