Derivative Instruments (Credit-Risk-Related Contingent Features) (Details) - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Derivative [Line Items]
Fair value of derivative instruments with credit-risk-related contingent features that were in a liability position	$ 4,400,000,000	$ 4,000,000,000.0
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall to BBB/Baa2	480,000,000	650,000,000
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall below investment grade	3,100,000,000	3,200,000,000
Additional collateral requirements if non-ratings based contract provisions are triggered	1,500,000,000	1,700,000,000
Collateral already posted, aggregate fair value	300,000,000	98,000,000
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	1,368,000,000	1,560,000,000
Florida Power & Light Company
Derivative [Line Items]
Fair value of derivative instruments with credit-risk-related contingent features that were in a liability position	47,000,000	38,000,000
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall to BBB/Baa2	0	30,000,000
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall below investment grade	15,000,000	65,000,000
Additional collateral requirements if non-ratings based contract provisions are triggered	135,000,000	95,000,000
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