Debt - Long-term Debt Issuances and Borrowings (Details) - NextEra Energy Capital Holdings, Inc.	Mar. 31, 2026 USD ($)
Debentures – fixed
Debt Instrument [Line Items]
Principal amount	$ 1,300,000,000
Debentures – fixed \| Minimum
Debt Instrument [Line Items]
Interest rate (as a percent)	4.40%
Debentures – fixed \| Maximum
Debt Instrument [Line Items]
Interest rate (as a percent)	5.85%
Euro Denominated Debentures
Debt Instrument [Line Items]
Principal amount	$ 1,549,000,000
Euro Denominated Debentures \| Minimum
Debt Instrument [Line Items]
Interest rate (as a percent)	2.989%
Euro Denominated Debentures \| Maximum
Debt Instrument [Line Items]
Interest rate (as a percent)	3.624%
Debentures Related To Nextera Energys Equity Units [Member]
Debt Instrument [Line Items]
Principal amount	$ 2,300,000,000
Interest rate (as a percent)	4.00%
Euro Denominated Junior Subordinated Debentures
Debt Instrument [Line Items]
Principal amount	$ 2,067,000,000
Euro Denominated Junior Subordinated Debentures \| Minimum
Debt Instrument [Line Items]
Interest rate (as a percent)	4.20%
Euro Denominated Junior Subordinated Debentures \| Maximum
Debt Instrument [Line Items]
Interest rate (as a percent)	4.75%
Junior Subordinated Debt
Debt Instrument [Line Items]
Principal amount	$ 600,000,000
Interest rate (as a percent)	6.50%
Euro Denominated Junior Subordinated Debentures Series 1 \| Minimum
Debt Instrument [Line Items]
Interest rate (as a percent)	4.20%
Euro Denominated Junior Subordinated Debentures Series 2 \| Minimum
Debt Instrument [Line Items]
Interest rate (as a percent)	4.75%