Debt - Long-term Debt Issuances and Borrowings (Details)	Sep. 30, 2025 USD ($)
Florida Power & Light Company | First mortgage bonds
Debt Instrument [Line Items]
Principal amount	$ 2,000,000,000
Florida Power & Light Company | First mortgage bonds | Minimum
Debt Instrument [Line Items]
Interest Rate (as a percent)	5.30%
Florida Power & Light Company | First mortgage bonds | Maximum
Debt Instrument [Line Items]
Interest Rate (as a percent)	5.80%
NextEra Energy Capital Holdings, Inc. | Debentures – fixed
Debt Instrument [Line Items]
Principal amount	$ 4,500,000,000
NextEra Energy Capital Holdings, Inc. | Debentures – fixed | Minimum
Debt Instrument [Line Items]
Interest Rate (as a percent)	4.85%
NextEra Energy Capital Holdings, Inc. | Debentures – fixed | Maximum
Debt Instrument [Line Items]
Interest Rate (as a percent)	5.90%
NextEra Energy Capital Holdings, Inc. | Debentures variable
Debt Instrument [Line Items]
Principal amount	$ 500,000,000
NextEra Energy Capital Holdings, Inc. | Junior Subordinated Debt Variable
Debt Instrument [Line Items]
Principal amount	$ 2,500,000,000
NextEra Energy Capital Holdings, Inc. | Junior Subordinated Debt Variable | Minimum
Debt Instrument [Line Items]
Interest Rate (as a percent)	6.38%
NextEra Energy Capital Holdings, Inc. | Junior Subordinated Debt Variable | Maximum
Debt Instrument [Line Items]
Interest Rate (as a percent)	6.50%
NextEra Energy Capital Holdings, Inc. | Junior Subordinated Debt
Debt Instrument [Line Items]
Principal amount	$ 875,000,000
Interest Rate (as a percent)	6.50%
NextEra Energy Capital Holdings, Inc. | Australian Dollar Denominated Subordinated Notes
Debt Instrument [Line Items]
Principal amount	$ 506,000,000
Interest Rate (as a percent)	6.04%
NextEra Energy Capital Holdings, Inc. | Canadian Dollar Denominated Debentures
Debt Instrument [Line Items]
Principal amount	$ 1,463,000,000
NextEra Energy Capital Holdings, Inc. | Canadian Dollar Denominated Debentures | Minimum
Debt Instrument [Line Items]
Interest Rate (as a percent)	3.83%
NextEra Energy Capital Holdings, Inc. | Canadian Dollar Denominated Debentures | Maximum
Debt Instrument [Line Items]
Interest Rate (as a percent)	4.67%
NextEra Energy Capital Holdings, Inc. | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Principal amount	$ 1,150,000,000
NEER Segment | Other Long-Term Debt - Variable
Debt Instrument [Line Items]
Principal amount	480,000,000
NEER Segment | Other Long-Term Debt - Variable, Maturing 2030
Debt Instrument [Line Items]
Principal amount	$ 330,000,000