Derivative Instruments (Credit-Risk-Related Contingent Features) (Details) - USD ($)	Jun. 30, 2025	Dec. 31, 2024
Derivative [Line Items]
Fair value of derivative instruments with credit-risk-related contingent features that were in a liability position	$ 4,300,000,000	$ 3,800,000,000
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall to BBB/Baa2	395,000,000	500,000,000
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall below investment grade	2,500,000,000	2,400,000,000
Additional collateral requirements if non-ratings based contract provisions are triggered	2,000,000,000.0	1,400,000,000
Collateral already posted, aggregate fair value	179,000,000	19,000,000
Letters of credit posted through the normal course of business that could be applied toward the collateral requirements related to derivative instruments with credit-risk-related contingent features	1,307,000,000	1,334,000,000
Florida Power & Light Company
Derivative [Line Items]
Fair value of derivative instruments with credit-risk-related contingent features that were in a liability position	64,000,000	11,000,000
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall to BBB/Baa2	45,000,000	0
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall below investment grade	75,000,000	25,000,000
Additional collateral requirements if non-ratings based contract provisions are triggered	105,000,000	70,000,000
Collateral already posted, aggregate fair value	0	0
Letters of credit posted through the normal course of business that could be applied toward the collateral requirements related to derivative instruments with credit-risk-related contingent features	$ 0	$ 0