Non-Derivative Fair Value Measurements (Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2021
Fair value measurements made on a recurring basis [Member]
Cash equivalents:
Equity securities	$ 758	$ 961
Special use funds:
Equity securities	4,946	4,437
U.S. Government and municipal bonds	630	704
Corporate debt securities	672	722
Asset-backed securities	830	615
Other debt securities	16	20
Other investments:
Equity Securities	54	31
U.S. Government and Municipal Bonds	294	235
Corporate Debt Securities	435	233
Other Debt Securities	256	67
Level 1 | Fair value measurements made on a recurring basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring [Line Items]
Restricted cash	19	69
Cash equivalents:
Equity securities	758	961
Special use funds:
Equity securities	2,207	2,062
U.S. Government and municipal bonds	577	641
Corporate debt securities	3	6
Asset-backed securities	0	0
Other debt securities	0	1
Other investments:
Equity Securities	54	30
U.S. Government and Municipal Bonds	291	117
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	2,739	2,375
U.S. Government and municipal bonds	53	63
Corporate debt securities	669	716
Asset-backed securities	830	615
Other debt securities	16	19
Other investments:
Equity Securities	0	1
U.S. Government and Municipal Bonds	3	118
Corporate Debt Securities	312	125
Other Debt Securities	244	57
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
U.S. Government and Municipal Bonds	0	0
Corporate Debt Securities	123	108
Other Debt Securities	12	10
Florida Power & Light Company | Fair value measurements made on a recurring basis [Member]
Cash equivalents:
Equity securities	33	36
Special use funds:
Equity securities	3,295	2,905
U.S. Government and municipal bonds	475	534
Corporate debt securities	492	553
Asset-backed securities	643	473
Other debt securities	8	12
Other investments:
Equity Securities	10	9
Other Debt Securities		114
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	12	33
Cash equivalents:
Equity securities	33	36
Special use funds:
Equity securities	804	743
U.S. Government and municipal bonds	454	505
Corporate debt securities	2	6
Asset-backed securities	0	0
Other debt securities	0	1
Other investments:
Equity Securities	10	9
Other Debt Securities		0
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	2,491	2,162
U.S. Government and municipal bonds	21	29
Corporate debt securities	490	547
Asset-backed securities	643	473
Other debt securities	8	11
Other investments:
Equity Securities	0	0
Other Debt Securities		114
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
Other Debt Securities		0
NextEra Energy Transmission, LLC Subsidiary [Member]
Other investments:
Contingent consideration liabilities	$ 130	$ 203
NextEra Energy Transmission, LLC Subsidiary [Member] | GridLiance [Member]
Other investments:
Contingent consideration liabilities			$ 264