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Non-Derivative Fair Value Measurements (Fair Value of Instruments Recorded at Other Than Fair Value and Special Use Funds) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Special use funds: nuclear decommissioning fund assets | $ 7,934 | $ 7,703
Special Use Funds Storm Fund Assets | 76 | 76
Available for sale debt securities amortized cost | $ 2,134 | 2,009
Special Use Funds Nuclear Decommissioning Funds Weighted Average Maturity | 8 years |
Fair Value Assumptions, Expected Term | 1 year |
Carrying Amount [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Special Use Funds Fair Value Disclosure | $ 853 | 919
Other Investments Financial Instruments Primarily Notes Receivable Fair Value Disclosure | 28 | 29
Long Term Debt Including Current Maturities Fair Value And Carrying Value | 49,902 | 46,082
Estimated Fair Value [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Special Use Funds Fair Value Disclosure | 854 | 920
Other Investments Financial Instruments Primarily Notes Receivable Fair Value Disclosure | 28 | 29
Long Term Debt Including Current Maturities Fair Value And Carrying Value | 53,173 | 51,525
FPL [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Special use funds: nuclear decommissioning fund assets | 5,441 | 5,271
Special Use Funds Storm Fund Assets | 76 | 76
Available for sale debt securities amortized cost | $ 1,642 | 1,521
Special Use Funds Nuclear Decommissioning Funds Weighted Average Maturity | 8 years |
Fair Value Assumptions, Expected Term | 1 year |
FPL [Member] | Carrying Amount [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Special Use Funds Fair Value Disclosure | $ 644 | 718
Long Term Debt Including Current Maturities Fair Value And Carrying Value | 17,421 | 17,236
FPL [Member] | Estimated Fair Value [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Special Use Funds Fair Value Disclosure | 645 | 719
Long Term Debt Including Current Maturities Fair Value And Carrying Value | $ 19,859 | $ 21,178

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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. Fair value and carrying value of long-term debt including current maturities at the balance sheet date. + References No definition available. + Details
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- Definition Other investments that are carried at estimated fair value or cost, which approximates fair value. + References No definition available. + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. An amount representing decommission fund to pay for the costs of decontaminating and decommissioning of facilities through collection of revenues derived from utility assessments and government appropriations. + References No definition available. + Details
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- Definition This item represents the weighted-average maturity of debt securities (in years) in nuclear decommissioning funds at the balance sheet date and which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition This item represents the weighted-average maturity of debt securities (in years) held by a regulated entity in the storm fund at the balance sheet date and which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 + Details
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- Definition The fair value of investments held in a trust fund to pay for the costs of decontaminating and decommissioning facilities, whether such amount is presented as a separate caption or as a parenthetical disclosure on the balance sheet. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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