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Derivative Instruments (Credit-Risk-Related Contingent Features) (Details) - USD ($) | Sep. 30, 2025 | Dec. 31, 2024
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Derivative [Line Items] |  |
Fair value of derivative instruments with credit-risk-related contingent features that were in a liability position | $ 4,100,000,000 | $ 3,800,000,000
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall to BBB/Baa2 | 405,000,000 | 500,000,000
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall below investment grade | 2,700,000,000 | 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 | 222,000,000 | 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 | 1,531,000,000 | 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 | 23,000,000 | 11,000,000
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall to BBB/Baa2 | 5,000,000 | 0
Total required posted collateral should FPL's and Capital Holdings' credit ratings fall below investment grade | 50,000,000 | 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 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

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- Definition The aggregate fair value of collateral that would be required to be posted for derivative instruments with credit-risk-related contingent features if the applicable corporate credit ratings were downgraded to BBB/Baa2 at the end of the reporting period. + References No definition available. + Details
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- Definition The aggregate fair value of collateral that would be required to be posted for derivative instruments with credit-risk-related contingent features if the applicable corporate credit ratings were downgraded to below investment grade at the end of the reporting period. + References No definition available. + Details
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- Definition The aggregate fair value of additional collateral that would be required to be posted for derivative instruments with credit-risk-related contingent features if certain cross-default provisions or certain financial measurement requirements were triggered at the end of the reporting period. + References No definition available. + Details
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- Definition Letters of Credit that are already posted in the normal course of business, at the end of the reporting period, that could be applied toward the collateral requirements for derivative instruments with credit-risk-related contingent features. + References No definition available. + Details
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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 185 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-185 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4H -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4H + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
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- Definition The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 185 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-185 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4H -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4H + Details
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