| Capital Expenditures Independent Power Investments And Nuclear Fuel Purchases | $4.9B | $5.5B | — | $7.9B | $5.7B | $5.7B | — | $11.1B |
| Cash Provided by (Used in) Investing Activity, Including Discontinued Operation | -$4.8B | -$4.3B | -$3.9B | -$7.7B | -$5.8B | -$5.1B | -$5.2B | -$10.8B |
| Debt issued (Note 13) | $6.3B | $2.1B | $8.6B | $9.8B | $3.2B | $2.3B | $8.1B | $8.3B |
| Independent Power Investments | $2.8B | $3.4B | $2.8B | $5.4B | $3.6B | $3.2B | $3.1B | $7.9B |
| Cash Provided by (Used in) Financing Activity, Including Discontinued Operation | $762.0M | $459.0M | $741.0M | $6.1B | $2.1B | $1.8B | $3.0B | $7.7B |
| OPERATING REVENUES | $6.1B | $7.6B | $5.4B | $6.2B | $6.7B | $8.0B | $6.5B | $6.7B |
| Capital investments accrued but not yet paid | $795.0M | $887.0M | $2.5B | $4.2B | $0.0 | $1.2B | $2.9B | $6.1B |
| Net change in commercial paper | -$164.0M | -$208.0M | -$2.3B | $335.0M | $2.0B | $235.0M | — | $3.4B |
| Repayments of Long-Term Debt | $2.5B | $2.4B | $1.2B | $2.9B | $2.3B | $2.4B | $2.8B | $3.1B |
| Capital Expenditures of FPL | $2.0B | $2.0B | $1.8B | $2.3B | $1.9B | $2.5B | $2.0B | $3.0B |
| Cash Provided by (Used in) Operating Activity, Including Discontinued Operation | $3.9B | $4.3B | $2.0B | $2.8B | $3.2B | $4.0B | $2.5B | $2.6B |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent | $1.6B | $1.9B | — | $845.0M | $2.1B | $2.4B | — | $2.2B |
| Other Comprehensive Income (Loss) | $1.6B | $1.9B | — | $845.0M | $2.1B | $2.4B | — | $2.2B |
| Comprehensive Income Including Noncontrolling Interest | $1.3B | $1.6B | — | $476.0M | $1.7B | $2.1B | — | $1.7B |
| Comprehensive Income Attributable to Parent | $1.3B | $1.6B | — | $476.0M | $1.7B | $2.1B | — | $1.7B |
| Comprehensive Income Including Noncontrolling Interest | $1.3B | $1.6B | — | $476.0M | $1.7B | $2.1B | — | $1.7B |
| Comprehensive income (loss), including noncontrolling interest | $1.3B | $1.6B | — | $476.0M | $1.7B | $2.1B | — | $1.7B |
| Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | $1.3B | $1.6B | — | $476.0M | $1.7B | $2.1B | — | $1.7B |
| Comprehensive Income (Loss), Total | $1.3B | $1.6B | — | $476.0M | $1.7B | $2.1B | — | $1.7B |
| Comprehensive Income, Including Noncontrolling Interest | $1.3B | $1.6B | — | $476.0M | $1.7B | $2.1B | — | $1.7B |
| Comprehensive Income Including Noncontrolling Interest | $1.3B | $1.6B | — | $476.0M | $1.7B | $2.1B | — | $1.7B |
| Total Comprehensive Income | $1.3B | $1.6B | — | $476.0M | $1.7B | $2.1B | — | $1.7B |
| Comprehensive Income | — | — | — | $476.0M | — | — | — | $1.7B |
| Payments to Acquire Investments to be Held in Decommissioning Trust Fund | $1.5B | $1.2B | — | $1.3B | $1.8B | $1.5B | — | $1.7B |
| Proceeds from Decommissioning Trust Fund Assets | $1.2B | $1.1B | $2.1B | $1.3B | $1.6B | $1.4B | $1.2B | $1.5B |
| Fuel, purchased power and interchange | $1.3B | $1.5B | $1.1B | $1.2B | $1.2B | $1.4B | $1.2B | $1.3B |
| Payments of Dividends | $1.1B | $1.1B | $1.1B | $1.2B | $1.2B | $1.2B | $1.2B | $1.3B |
| Cash Dividends Paid | — | — | — | $1.2B | — | — | — | $1.3B |
| Interest expense | $820.0M | $1.8B | — | $1.8B | $1.1B | $1.2B | $585.0M | $1.3B |
| Interest Paid, Net | $487.0M | $918.0M | $813.0M | $631.0M | $871.0M | $1.1B | $878.0M | $1.0B |
| Interest Paid, Excluding Capitalized Interest, Operating Activity | $487.0M | $918.0M | $813.0M | $631.0M | $871.0M | $1.1B | $878.0M | $1.0B |
| Effective Income Tax Rate Reconciliation, Production And Investment Tax Credits, Amount | — | — | — | $540.0M | — | — | — | $791.0M |
| Cash paid (received) for income taxes - net | -$192.0M | -$228.0M | -$145.0M | -$114.0M | -$239.0M | -$444.0M | -$478.0M | -$665.0M |
| Proceeds from other short-term debt | $0.0 | $3.1B | $217.0M | $850.0M | $550.0M | $550.0M | $608.0M | $650.0M |
| Taxes other than income taxes and other – net | $568.0M | $602.0M | $557.0M | $594.0M | $630.0M | $653.0M | $592.0M | $628.0M |
| Net Change in Cash and Restricted Cash | — | — | — | $1.1B | — | — | — | -$531.0M |
| OCI Attributable to Noncontrolling Interest | -$328.0M | -$260.0M | — | -$369.0M | -$389.0M | -$303.0M | — | -$494.0M |
| Less: comprehensive income attributable to noncontrolling interest | -$328.0M | -$260.0M | — | -$369.0M | -$389.0M | -$303.0M | — | -$494.0M |
| Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | -$326.0M | -$261.0M | — | -$369.0M | -$389.0M | -$303.0M | — | -$494.0M |
| Comprehensive Income Attributable to Noncontrolling Interests | -$328.0M | -$260.0M | — | -$369.0M | -$389.0M | -$303.0M | — | -$494.0M |
| Comprehensive Income, Noncontrolling Interest | -$328.0M | -$260.0M | — | -$369.0M | -$389.0M | -$303.0M | — | -$494.0M |
| Deferred taxes | $224.0M | $0.0 | $758.0M | -$400.0M | -$112.0M | $52.0M | $913.0M | $409.0M |
| Change in Other Current Assets | $710.0M | — | $236.0M | -$222.0M | $723.0M | $174.0M | $245.0M | $368.0M |
| Increase (Decrease) in Other Current Assets | $710.0M | — | $236.0M | -$222.0M | $723.0M | $174.0M | $245.0M | $368.0M |
| Sale of independent power and other investments of NEER | $386.0M | $1.3B | $451.0M | $238.0M | $71.0M | $690.0M | $116.0M | $340.0M |
| All other operating activities | $74.0M | -$48.0M | $171.0M | $122.0M | $108.0M | $7.0M | $51.0M | $312.0M |
| Financing — other | -$214.0M | — | -$249.0M | -$20.0M | -$124.0M | -$355.0M | -$232.0M | -$304.0M |
| Increase (decrease) in other current liabilities | $937.0M | $420.0M | — | -$259.0M | $780.0M | $285.0M | — | -$288.0M |
| Gain in connection with sale | $29.0M | $231.0M | $34.0M | $36.0M | $18.0M | $143.0M | $63.0M | $257.0M |
| Gain (Loss) on Disposition of Assets | $145.0M | $232.0M | $65.0M | $34.0M | $121.0M | $211.0M | $73.0M | $257.0M |
| Unrealized losses | $114.0M | $313.0M | — | -$248.0M | $539.0M | $431.0M | — | -$255.0M |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | — | — | — | -$12.0M | — | — | — | $252.0M |
| Cost Recovery Clauses And Franchise Fees | -$298.0M | -$340.0M | -$70.0M | $133.0M | $26.0M | — | $72.0M | $201.0M |
| Increase (decrease) in all other liabilities | $56.0M | $25.0M | $120.0M | $108.0M | $109.0M | $98.0M | $185.0M | $180.0M |
| Payments for (Proceeds from) Nuclear Fuel | $105.0M | $89.0M | $65.0M | $153.0M | $126.0M | $32.0M | $242.0M | $144.0M |
| Gain (Loss), Foreign Currency Transaction, before Tax | $6.0M | — | $84.0M | -$8.0M | -$48.0M | — | -$83.0M | $138.0M |
| Increase (decrease) in other assets | $54.0M | $81.0M | $336.0M | $61.0M | $122.0M | $163.0M | $94.0M | $114.0M |
| Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount | — | — | — | -$78.0M | — | — | — | -$103.0M |
| Distributions of earnings from equity method investees | $152.0M | $319.0M | $170.0M | $123.0M | $58.0M | $172.0M | $93.0M | $100.0M |
| Nuclear fuel and other amortization | $62.0M | $78.0M | $69.0M | $81.0M | $84.0M | $97.0M | $99.0M | $91.0M |
| Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax | -$66.0M | -$66.0M | -$64.0M | -$67.0M | -$67.0M | -$67.0M | -$66.0M | -$71.0M |
| Change in unrealized gains (losses) on equity securities held in NEER's nuclear decommissioning funds – net | -$89.0M | $108.0M | — | -$68.0M | $70.0M | $63.0M | — | -$60.0M |
| Other investing activities, net | — | — | — | -$15.0M | — | — | — | -$45.0M |
| Payment for (Proceeds from) Other Investing Activity | $32.0M | — | — | -$15.0M | -$7.0M | -$27.0M | -$69.0M | -$45.0M |
| Other income, net (Note 6) | $89.0M | $95.0M | $118.0M | $72.0M | $71.0M | $61.0M | $66.0M | $44.0M |
| Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | — | — | — | $23.0M | — | — | — | $28.0M |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | — | — | — | $17.0M | — | — | — | -$28.0M |
| Other comprehensive income (loss), after-tax | — | — | — | $12.0M | — | — | — | -$25.0M |
| Other comprehensive income (loss) | -$6.0M | $43.0M | — | $12.0M | $44.0M | -$2.0M | — | -$25.0M |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amortization, Amount | — | — | — | -$43.0M | — | — | — | -$23.0M |
| Proceeds from Issuance of Common Stock | $14.0M | $27.0M | $1.0M | $11.0M | $11.0M | $2.0B | $10.0M | $23.0M |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount | — | — | — | -$16.0M | — | — | — | -$18.0M |
| OCI Unrealized Holding Gain (Loss) on Securities, Net of Tax | -$3.0M | $32.0M | — | $9.0M | $9.0M | $10.0M | — | -$17.0M |
| Unrealized Gain (Loss) on Securities | -$3.0M | $32.0M | — | $9.0M | $9.0M | $10.0M | — | -$17.0M |
| OCI Unrealized Holding Gain (Loss) on Securities, Net of Tax | -$3.0M | $32.0M | — | $9.0M | $9.0M | $10.0M | — | -$17.0M |
| Net unrealized gains (losses) on securities still held | -$3.0M | $32.0M | — | $9.0M | $9.0M | $10.0M | — | -$17.0M |
| Increase (Decrease) in Recoverable Property Damage Costs | $24.0M | $84.0M | $537.0M | $177.0M | $169.0M | $72.0M | $42.0M | $16.0M |
| Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | — | — | — | -$28.0M | — | — | — | -$12.0M |
| Add: dilutive effect of potential common shares (in shares) | $5.7M | $7.9M | — | $5.2M | $4.6M | $6.0M | — | $9.9M |
| Stock options excluded as their inclusion would be anti-dilutive (in shares) | $34.8M | $24.6M | — | $72.3M | $72.9M | $49.7M | — | $8.3M |
| Other comprehensive income (loss), net of tax | -$7.0M | $8.0M | — | $0.0 | $33.0M | -$13.0M | — | -$8.0M |
| Foreign currency translation gains (losses) | -$7.0M | $8.0M | — | $0.0 | $33.0M | -$13.0M | — | -$8.0M |
| Foreign Currency Translation Adjustment, Net of Tax | -$7.0M | $8.0M | — | $0.0 | $33.0M | -$13.0M | — | -$8.0M |
| OCI Available-for-Sale Securities Tax | -$1.0M | $10.0M | — | $3.0M | $3.0M | $3.0M | — | -$5.0M |
| OCI Unrealized Holding Gain (Loss) on Securities, Tax | -$1.0M | $10.0M | — | $3.0M | $3.0M | $3.0M | — | -$5.0M |
| Tax effect of unrealized gain (loss) on AFS securities | -$1.0M | $10.0M | — | $3.0M | $3.0M | $3.0M | — | -$5.0M |
| Tax expense (benefit) of unrealized gains/losses on available for sale securities still held | -$1.0M | $10.0M | — | $3.0M | $3.0M | $3.0M | — | -$5.0M |
| Unrealized Gain (Loss) on Available-for-Sale Securities, Net | -$1.0M | $10.0M | — | $3.0M | $3.0M | $3.0M | — | -$5.0M |
| Tax on Unrealized Gain (Loss) on Securities | -$1.0M | $10.0M | — | $3.0M | $3.0M | $3.0M | — | -$5.0M |
| Proceeds (Payments) From Other Capital Expenditures | $15.0M | $11.0M | — | $7.0M | — | — | — | $4.0M |
| Effect of Exchange Rate on Cash (Continuing Operations) | — | — | — | $0.0 | — | — | — | -$3.0M |
| Cash repayments to related parties – net | -$762.0M | -$630.0M | $0.0 | -$45.0M | -$84.0M | $0.0 | -$3.0M | -$2.0M |
| Number of reportable segments | — | — | — | — | — | — | — | 2.00 |
| Number of reportable segments | — | — | — | $2.0 | — | — | — | $2.0 |
| Effective Income Tax Rate Reconciliation, Production And Investment Tax Credits | 32.8% | 25.5% | — | -947.2% | 47.0% | 38.9% | — | 66.0% |
| Common Stock Dividends Per Share (Paid) | $0.5 | $0.5 | — | $0.6 | $0.6 | $0.6 | — | $0.6 |
| Common stock dividends per share cash paid | $0.5 | $0.5 | — | $0.6 | $0.6 | $0.6 | — | $0.6 |
| Common Stock Dividends Per Share (Cash Paid) | $0.5 | $0.5 | — | $0.6 | $0.6 | $0.6 | — | $0.6 |
| Common Dividends Per Share Paid | $0.5 | $0.5 | — | $0.6 | $0.6 | $0.6 | — | $0.6 |
| Cash Dividend per Common Share | $0.5 | $0.5 | — | $0.6 | $0.6 | $0.6 | — | $0.6 |
| Effective tax rates | -$0.1 | $0.0 | — | $9.1 | -$0.2 | -$0.1 | — | -$0.4 |
| Income taxes at U.S. statutory rate of 21% | $0.2 | $0.2 | — | $0.2 | $0.2 | $0.2 | — | $0.2 |
| Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Percent | -$0.1 | -$0.0 | — | $1.4 | -$0.1 | -$0.0 | — | -$0.1 |
| Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent | — | — | — | -$0.4 | — | — | — | $0.0 |
| State income taxes – net of federal income tax benefit | $0.0 | $0.1 | — | -$0.3 | $0.0 | $0.0 | — | -$0.0 |
| Amortization of deferred regulatory credit | -3.7% | -2.9% | — | 75.8% | -2.9% | -2.3% | — | -1.9% |
| Foreign operations | — | — | — | $0.3 | — | — | — | -$0.0 |
| OCI Reclassification Adjustment for Sale of Securities | -$4.0M | -$1.0M | — | -$3.0M | -$1.0M | -$1.0M | — | $0.0 |
| OCI Reclassification Adjustment, Sale of Securities, Net of Tax | — | — | — | -$3.0M | — | — | — | $0.0 |
| Tax Benefit of Reclassification for Sale of Securities | — | — | — | -$1.0M | — | — | — | $0.0 |
| Impairment charge, net of tax | — | — | — | $500.0M | — | — | — | — |
| Tax expense (benefit) of other comprehensive income (loss), reclassification adjustment from AOCI for sale of securities | -$1.0M | -$1.0M | — | -$1.0M | $0.0 | $0.0 | — | $0.0 |
| Repayments of Other Short-Term Debt | $700.0M | $618.0M | $5.1B | $850.0M | $0.0 | $217.0M | $1.1B | $0.0 |
| Other differential membership interests activity | -$456.0M | $0.0 | — | -$343.0M | -$13.0M | -$49.0M | — | — |
| Net income (loss) | $3.0M | $0.0 | — | $3.0M | $1.0M | $0.0 | — | — |
| Other – net | $0.0 | $0.0 | — | $0.0 | $0.0 | $0.0 | — | — |
| Other Comprehensive Income (Loss) | $0.0 | $0.0 | — | $0.0 | $0.0 | $0.0 | — | — |
