Derivative Instruments (Credit Risk Disclosures) (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Derivative [Line Items]
Fair value of derivative instruments with credit-risk-related contingent features that were in a liability position	$ 4,000,000,000.0	$ 3,800,000,000
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall to BBB/Baa2	650,000,000	500,000,000
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall below investment grade	3,200,000,000	2,400,000,000
Additional collateral requirements if non-ratings based contract provisions are triggered	1,700,000,000	1,400,000,000
Collateral Already Posted, Aggregate Fair Value	98,000,000	19,000,000
Letters Of Credit Already Posted Aggregate Fair Value	1,560,000,000	1,334,000,000
FPL
Derivative [Line Items]
Fair value of derivative instruments with credit-risk-related contingent features that were in a liability position	38,000,000	11,000,000
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall to BBB/Baa2	30,000,000	0
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall below investment grade	65,000,000	25,000,000
Additional collateral requirements if non-ratings based contract provisions are triggered	95,000,000	70,000,000
Collateral Already Posted, Aggregate Fair Value	0	0
Letters Of Credit Already Posted Aggregate Fair Value	$ 0	$ 0