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Fair Value Measurements | 9 Months Ended
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Sep. 30, 2019
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements The fair value of assets and liabilities are determined using either unadjusted quoted prices in active markets (Level 1) or pricing inputs that are observable (Level 2) whenever that information is available and using unobservable inputs (Level 3) to estimate fair value only when relevant observable inputs are not available. NEE and FPL use several different valuation techniques to measure the fair value of assets and liabilities, relying primarily on the market approach of using prices and other market information for identical and/or comparable assets and liabilities for those assets and liabilities that are measured at fair value on a recurring basis. NEE's and FPL's assessment of the significance of any particular input to the fair value measurement requires judgment and may affect placement within the fair value hierarchy levels. Non-performance risk, including the consideration of a credit valuation adjustment, is also considered in the determination of fair value for all assets and liabilities measured at fair value. Cash Equivalents and Restricted Cash Equivalents - NEE and FPL hold investments in money market funds. The fair value of these funds is estimated using a market approach based on current observable market prices. Special Use Funds and Other Investments - NEE and FPL hold primarily debt and equity securities directly, as well as indirectly through commingled funds. Substantially all directly held equity securities are valued at their quoted market prices. For directly held debt securities, multiple prices and price types are obtained from pricing vendors whenever possible, which enables cross-provider validations. A primary price source is identified based on asset type, class or issue of each security. Commingled funds, which are similar to mutual funds, are maintained by banks or investment companies and hold certain investments in accordance with a stated set of objectives. The fair value of commingled funds is primarily derived from the quoted prices in active markets of the underlying securities. Because the fund shares are offered to a limited group of investors, they are not considered to be traded in an active market. Derivative Instruments - NEE and FPL measure the fair value of commodity contracts using a combination of market and income approaches utilizing prices observed on commodities exchanges and in the OTC markets, or through the use of industry-standard valuation techniques, such as option modeling or discounted cash flows techniques, incorporating both observable and unobservable valuation inputs. The resulting measurements are the best estimate of fair value as represented by the transfer of the asset or liability through an orderly transaction in the marketplace at the measurement date. Most exchange-traded derivative assets and liabilities are valued directly using unadjusted quoted prices. For exchange-traded derivative assets and liabilities where the principal market is deemed to be inactive based on average daily volumes and open interest, the measurement is established using settlement prices from the exchanges, and therefore considered to be valued using other observable inputs. NEE, through its subsidiaries, including FPL, also enters into OTC commodity contract derivatives. The majority of these contracts are transacted at liquid trading points, and the prices for these contracts are verified using quoted prices in active markets from exchanges, brokers or pricing services for similar contracts. NEE, through NEER, also enters into full requirements contracts, which, in most cases, meet the definition of derivatives and are measured at fair value. These contracts typically have one or more inputs that are not observable and are significant to the valuation of the contract. In addition, certain exchange and non-exchange traded derivative options at NEE have one or more significant inputs that are not observable, and are valued using industry-standard option models. In all cases where NEE and FPL use significant unobservable inputs for the valuation of a commodity contract, consideration is given to the assumptions that market participants would use in valuing the asset or liability. The primary input to the valuation models for commodity contracts is the forward commodity curve for the respective instruments. Other inputs include, but are not limited to, assumptions about market liquidity, volatility, correlation and contract duration as more fully described below in Significant Unobservable Inputs Used in Recurring Fair Value Measurements. In instances where the reference markets are deemed to be inactive or do not have transactions for a similar contract, the derivative assets and liabilities may be valued using significant other observable inputs and potentially significant unobservable inputs. In such instances, the valuation for these contracts is established using techniques including extrapolation from or interpolation between actively traded contracts, or estimated basis adjustments from liquid trading points. NEE and FPL regularly evaluate and validate the inputs used to determine fair value by a number of methods, consisting of various market price verification procedures, including the use of pricing services and multiple broker quotes to support the market price of the various commodities. In all cases where there are assumptions and models used to generate inputs for valuing derivative assets and liabilities, the review and verification of the assumptions, models and changes to the models are undertaken by individuals that are independent of those responsible for estimating fair value. NEE uses interest rate contracts and foreign currency contracts to mitigate and adjust interest rate and foreign currency exchange exposure related primarily to certain outstanding and expected future debt issuances and borrowings when deemed appropriate based on market conditions or when required by financing agreements. NEE estimates the fair value of these derivatives using an income approach based on a discounted cash flows valuation technique utilizing the net amount of estimated future cash inflows and outflows related to the agreements. Recurring Fair Value Measurements - NEE's and FPL's financial assets and liabilities and other fair value measurements made on a recurring basis by fair value hierarchy level are as follows:
| September 30, 2019 |
| Level 1 |  | Level 2 |  | Level 3 |  | Netting(a) |  | Total |
| (millions) |
Assets: |  |  |  |  |  |  |  |  |  |
Cash equivalents and restricted cash equivalents:(b) |  |  |  |  |  |  |  |  |  |
NEE - equity securities | $ | 924 |  |  | $ | — |  |  | $ | — |  |  |  |  | $ | 924 |  |
FPL - equity securities | $ | 196 |  |  | $ | — |  |  | $ | — |  |  |  |  | $ | 196 |  |
Special use funds:(c) |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Equity securities | $ | 1,725 |  |  | $ | 1,909 |  | (d) | $ | — |  |  |  |  | $ | 3,634 |  |
U.S. Government and municipal bonds | $ | 552 |  |  | $ | 144 |  |  | $ | — |  |  |  |  | $ | 696 |  |
Corporate debt securities | $ | — |  |  | $ | 777 |  |  | $ | — |  |  |  |  | $ | 777 |  |
Mortgage-backed securities | $ | — |  |  | $ | 452 |  |  | $ | — |  |  |  |  | $ | 452 |  |
Other debt securities | $ | — |  |  | $ | 116 |  |  | $ | — |  |  |  |  | $ | 116 |  |
FPL: |  |  |  |  |  |  |  |  |  |
Equity securities | $ | 553 |  |  | $ | 1,731 |  | (d) | $ | — |  |  |  |  | $ | 2,284 |  |
U.S. Government and municipal bonds | $ | 420 |  |  | $ | 105 |  |  | $ | — |  |  |  |  | $ | 525 |  |
Corporate debt securities | $ | — |  |  | $ | 542 |  |  | $ | — |  |  |  |  | $ | 542 |  |
Mortgage-backed securities | $ | — |  |  | $ | 344 |  |  | $ | — |  |  |  |  | $ | 344 |  |
Other debt securities | $ | — |  |  | $ | 106 |  |  | $ | — |  |  |  |  | $ | 106 |  |
Other investments:(e) |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Equity securities | $ | 18 |  |  | $ | 12 |  |  | $ | — |  |  |  |  | $ | 30 |  |
Debt securities | $ | 105 |  |  | $ | 67 |  |  | $ | — |  |  |  |  | $ | 172 |  |
Derivatives: |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Commodity contracts | $ | 1,003 |  |  | $ | 1,827 |  |  | $ | 1,586 |  |  | $ | (2,213 | ) |  | $ | 2,203 |  | (f)
Interest rate contracts | $ | — |  |  | $ | 27 |  |  | $ | — |  |  | $ | (21 | ) |  | $ | 6 |  | (f)
Foreign currency contracts | $ | — |  |  | $ | 20 |  |  | $ | — |  |  | $ | — |  |  | $ | 20 |  | (f)
FPL - commodity contracts | $ | — |  |  | $ | 9 |  |  | $ | 1 |  |  | $ | (3 | ) |  | $ | 7 |  | (f)
Liabilities: |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Commodity contracts | $ | 1,030 |  |  | $ | 1,232 |  |  | $ | 389 |  |  | $ | (2,156 | ) |  | $ | 495 |  | (f)
Interest rate contracts | $ | — |  |  | $ | 810 |  |  | $ | 146 |  |  | $ | (21 | ) |  | $ | 935 |  | (f)
Foreign currency contracts | $ | — |  |  | $ | 42 |  |  | $ | — |  |  | $ | — |  |  | $ | 42 |  | (f)
FPL - commodity contracts | $ | — |  |  | $ | 8 |  |  | $ | 11 |  |  | $ | (3 | ) |  | $ | 16 |  | (f)
———————————————
(a) | Includes the effect of the contractual ability to settle contracts under master netting arrangements and the netting of margin cash collateral payments and receipts. NEE and FPL also have contract settlement receivable and payable balances that are subject to the master netting arrangements but are not offset within the condensed consolidated balance sheets and are recorded in customer receivables - net and accounts payable, respectively.
(b) | Includes restricted cash equivalents of approximately $66 million ($62 million for FPL) in current other assets and $89 million ($89 million for FPL) in noncurrent other assets on the condensed consolidated balance sheets.
(c) | Excludes investments accounted for under the equity method and loans not measured at fair value on a recurring basis. See Fair Value of Financial Instruments Recorded at Other than Fair Value below.
(d) | Primarily invested in commingled funds whose underlying securities would be Level 1 if those securities were held directly by NEE or FPL.
(e) | Included in noncurrent other assets in the condensed consolidated balance sheets.
(f) | See Note 4 - Fair Value of Derivative Instruments for a reconciliation of net derivatives to NEE's and FPL's condensed consolidated balance sheets.
| December 31, 2018 |
| Level 1 |  | Level 2 |  | Level 3 |  | Netting(a) |  | Total |
| (millions) |
Assets: |  |  |  |  |  |  |  |  |  |
Cash equivalents and restricted cash equivalents:(b) |  |  |  |  |  |  |  |  |  |
NEE - equity securities | $ | 486 |  |  | $ | — |  |  | $ | — |  |  |  |  | $ | 486 |  |
FPL - equity securities | $ | 206 |  |  | $ | — |  |  | $ | — |  |  |  |  | $ | 206 |  |
Special use funds:(c) |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Equity securities | $ | 1,445 |  |  | $ | 1,601 |  | (d) | $ | — |  |  |  |  | $ | 3,046 |  |
U.S. Government and municipal bonds | $ | 449 |  |  | $ | 155 |  |  | $ | — |  |  |  |  | $ | 604 |  |
Corporate debt securities | $ | — |  |  | $ | 728 |  |  | $ | — |  |  |  |  | $ | 728 |  |
Mortgage-backed securities | $ | — |  |  | $ | 478 |  |  | $ | — |  |  |  |  | $ | 478 |  |
Other debt securities | $ | — |  |  | $ | 145 |  |  | $ | 1 |  |  |  |  | $ | 146 |  |
FPL: |  |  |  |  |  |  |  |  |  |
Equity securities | $ | 398 |  |  | $ | 1,452 |  | (d) | $ | — |  |  |  |  | $ | 1,850 |  |
U.S. Government and municipal bonds | $ | 350 |  |  | $ | 120 |  |  | $ | — |  |  |  |  | $ | 470 |  |
Corporate debt securities | $ | — |  |  | $ | 544 |  |  | $ | — |  |  |  |  | $ | 544 |  |
Mortgage-backed securities | $ | — |  |  | $ | 367 |  |  | $ | — |  |  |  |  | $ | 367 |  |
Other debt securities | $ | — |  |  | $ | 131 |  |  | $ | 1 |  |  |  |  | $ | 132 |  |
Other investments:(e) |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Equity securities | $ | 13 |  |  | $ | 11 |  |  | $ | — |  |  |  |  | $ | 24 |  |
Debt securities | $ | 36 |  |  | $ | 90 |  |  | $ | — |  |  |  |  | $ | 126 |  |
Derivatives: |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Commodity contracts | $ | 1,379 |  |  | $ | 1,923 |  |  | $ | 1,349 |  |  | $ | (2,811 | ) |  | $ | 1,840 |  | (f)
Interest rate contracts | $ | — |  |  | $ | 56 |  |  | $ | — |  |  | $ | (7 | ) |  | $ | 49 |  | (f)
Foreign currency contracts | $ | — |  |  | $ | 17 |  |  | $ | — |  |  | $ | 13 |  |  | $ | 30 |  | (f)
FPL - commodity contracts | $ | — |  |  | $ | 2 |  |  | $ | — |  |  | $ | (2 | ) |  | $ | — |  | (f)
Liabilities: |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Commodity contracts | $ | 1,329 |  |  | $ | 1,410 |  |  | $ | 566 |  |  | $ | (2,622 | ) |  | $ | 683 |  | (f)
Interest rate contracts | $ | — |  |  | $ | 336 |  |  | $ | 136 |  |  | $ | (7 | ) |  | $ | 465 |  | (f)
Foreign currency contracts | $ | — |  |  | $ | 30 |  |  | $ | — |  |  | $ | 13 |  |  | $ | 43 |  | (f)
FPL - commodity contracts | $ | — |  |  | $ | 7 |  |  | $ | 36 |  |  | $ | (2 | ) |  | $ | 41 |  | (f)
———————————————
(a) | Includes the effect of the contractual ability to settle contracts under master netting arrangements and the netting of margin cash collateral payments and receipts. NEE and FPL also have contract settlement receivable and payable balances that are subject to the master netting arrangements but are not offset within the condensed consolidated balance sheets and are recorded in customer receivables - net and accounts payable, respectively.
(b) | Includes restricted cash equivalents of approximately $85 million ($81 million for FPL) in current other assets on the condensed consolidated balance sheets.
(c) | Excludes investments accounted for under the equity method and loans not measured at fair value on a recurring basis. See Fair Value of Financial Instruments Recorded at Other than Fair Value below.
(d) | Primarily invested in commingled funds whose underlying securities would be Level 1 if those securities were held directly by NEE or FPL.
(e) | Included in noncurrent other assets in the condensed consolidated balance sheets.
(f) | See Note 4 - Fair Value of Derivative Instruments for a reconciliation of net derivatives to NEE's and FPL's condensed consolidated balance sheets.
Significant Unobservable Inputs Used in Recurring Fair Value Measurements - The valuation of certain commodity contracts requires the use of significant unobservable inputs. All forward price, implied volatility, implied correlation and interest rate inputs used in the valuation of such contracts are directly based on third-party market data, such as broker quotes and exchange settlements, when that data is available. If third-party market data is not available, then industry standard methodologies are used to develop inputs that maximize the use of relevant observable inputs and minimize the use of unobservable inputs. Observable inputs, including some forward prices, implied volatilities and interest rates used for determining fair value are updated daily to reflect the best available market information. Unobservable inputs which are related to observable inputs, such as illiquid portions of forward price or volatility curves, are updated daily as well, using industry standard techniques such as interpolation and extrapolation, combining observable forward inputs supplemented by historical market and other relevant data. Other unobservable inputs, such as implied correlations, customer migration rates from full requirements contracts and some implied volatility curves, are modeled using proprietary models based on historical data and industry standard techniques. All price, volatility, correlation and customer migration inputs used in valuation are subject to validation by the Trading Risk Management group. The Trading Risk Management group performs a risk management function responsible for assessing credit, market and operational risk impact, reviewing valuation methodology and modeling, confirming transactions, monitoring approval processes and developing and monitoring trading limits. The Trading Risk Management group is separate from the transacting group. For markets where independent third-party data is readily available, validation is conducted daily by directly reviewing this market data against inputs utilized by the transacting group, and indirectly by reviewing daily risk reports. For markets where independent third-party data is not readily available, additional analytical reviews are performed on at least a quarterly basis. These analytical reviews are designed to ensure that all price and volatility curves used for fair valuing transactions are adequately validated each quarter, and are reviewed and approved by the Trading Risk Management group. In addition, other valuation assumptions such as implied correlations and customer migration rates are reviewed and approved by the Trading Risk Management group on a periodic basis. Newly created models used in the valuation process are also subject to testing and approval by the Trading Risk Management group prior to use and established models are reviewed annually, or more often as needed, by the Trading Risk Management group. On a monthly basis, the Exposure Management Committee (EMC), which is comprised of certain members of senior management, meets with representatives from the Trading Risk Management group and the transacting group to discuss NEE's and FPL's energy risk profile and operations, to review risk reports and to discuss fair value issues as necessary. The EMC develops guidelines required for an appropriate risk management control infrastructure, which includes implementation and monitoring of compliance with Trading Risk Management policy. The EMC executes its risk management responsibilities through direct oversight and delegation of its responsibilities to the Trading Risk Management group, as well as to other corporate and business unit personnel. The significant unobservable inputs used in the valuation of NEE's commodity contracts categorized as Level 3 of the fair value hierarchy at September 30, 2019 are as follows:
|  | Fair Value at |  | Valuation |  | Significant |  |  |  |
Transaction Type |  | September 30, 2019 |  | Technique(s) |  | Unobservable Inputs |  | Range
|  | Assets |  | Liabilities |  |  |  |  |  |  |  |
|  | (millions) |  |  |  |  |  |  |  |
Forward contracts - power |  | $ | 909 |  |  | $ | 186 |  |  | Discounted cash flow |  | Forward price (per MWh) |  | $(15) | — | $181
Forward contracts - gas |  | 134 |  |  | 27 |  |  | Discounted cash flow |  | Forward price (per MMBtu) |  | $1 | — | $7
Forward contracts - other commodity related |  | 2 |  |  | 2 |  |  | Discounted cash flow |  | Forward price (various) |  | $1 | — | $58
Options - power |  | 33 |  |  | 9 |  |  | Option models |  | Implied correlations |  | 1% | — | 100%
|  |  |  |  |  |  |  | Implied volatilities |  | 5% | — | 213%
Options - primarily gas |  | 143 |  |  | 146 |  |  | Option models |  | Implied correlations |  | 1% | — | 100%
|  |  |  |  |  |  |  | Implied volatilities |  | 1% | — | 152%
Full requirements and unit contingent contracts |  | 365 |  |  | 19 |  |  | Discounted cash flow |  | Forward price (per MWh) |  | $(18) | — | $647
|  |  |  |  |  |  |  | Customer migration rate(a) |  | —% | — | 20%
Total |  | $ | 1,586 |  |  | $ | 389 |  |  |  |  |  |  |  |  |
———————————————
(a) | Applies only to full requirements contracts.
The sensitivity of NEE's fair value measurements to increases (decreases) in the significant unobservable inputs is as follows:
Significant Unobservable Input |  | Position |  | Impact on Fair Value Measurement
Forward price |  | Purchase power/gas |  | Increase (decrease)
|  | Sell power/gas |  | Decrease (increase)
Implied correlations |  | Purchase option |  | Decrease (increase)
|  | Sell option |  | Increase (decrease)
Implied volatilities |  | Purchase option |  | Increase (decrease)
|  | Sell option |  | Decrease (increase)
Customer migration rate |  | Sell power(a) |  | Decrease (increase)
———————————————
(a) | Assumes the contract is in a gain position.
In addition, the fair value measurement of interest rate contract net liabilities related to the solar projects in Spain of approximately $146 million at September 30, 2019 includes a significant credit valuation adjustment. The credit valuation adjustment, considered an unobservable input, reflects management's assessment of non-performance risk of the subsidiaries related to the solar projects in Spain that are party to the contracts. The reconciliation of changes in the fair value of derivatives that are based on significant unobservable inputs is as follows:
| Three Months Ended September 30,
| 2019 |  | 2018
| NEE |  | FPL |  | NEE |  | FPL
| (millions)
Fair value of net derivatives based on significant unobservable inputs at June 30 | $ | 1,231 |  |  | $ | (13 | ) |  | $ | 650 |  |  | $ | — |
Realized and unrealized gains (losses): |  |  |  |  |  |  |  |  |  |  |
Included in earnings(a) | (29 | ) |  | — |  |  | (131 | ) |  | — |
Included in other comprehensive income (loss)(b) | 6 |  |  | — |  |  | 1 |  |  | — |
Included in regulatory assets and liabilities | 2 |  |  | 2 |  |  | (1 | ) |  | (1 | )
Purchases | 27 |  |  | — |  |  | 22 |  |  | — |
Settlements | (146 | ) |  | 1 |  |  | 6 |  |  | (1 | )
Issuances | (13 | ) |  | — |  |  | (19 | ) |  | — |
Transfers out(c) | (27 | ) |  | — |  |  | — |  |  | — |
Fair value of net derivatives based on significant unobservable inputs at September 30 | $ | 1,051 |  |  | $ | (10 | ) |  | $ | 528 |  |  | $ | (2 | )
Gains (losses) included in earnings attributable to the change in unrealized gains (losses) relating to derivatives held at the reporting date(d) | $ | 53 |  |  | $ | — |  |  | $ | (115 | ) |  | $ | — |
———————————————
(a) | For the three months ended September 30, 2019 and 2018, realized and unrealized gains (losses) of approximately $(23) million and $(134) million, respectively, are included in the condensed consolidated statements of income in operating revenues and the balance is included in interest expense.
(b) | Included in net unrealized gains (losses) on foreign currency translation in the condensed consolidated statements of comprehensive income.
(c) | Transfers from Level 3 to Level 2 were a result of increased observability of market data. NEE's and FPL's policy is to recognize all transfers at the beginning of the reporting period.
(d) | For the three months ended September 30, 2019 and 2018, unrealized gains (losses) of approximately $61 million and $(118) million, respectively, are included in the condensed consolidated statements of income in operating revenues and the balance is included in interest expense.
| Nine Months Ended September 30,
| 2019 |  | 2018
| NEE |  | FPL |  | NEE |  | FPL
| (millions)
Fair value of net derivatives based on significant unobservable inputs at December 31 of prior period | $ | 647 |  |  | $ | (36 | ) |  | $ | 566 |  |  | $ | — |
Realized and unrealized gains (losses): |  |  |  |  |  |  |  |  |  |  |
Included in earnings(a) | 663 |  |  | — |  |  | (79 | ) |  | — |
Included in other comprehensive income (loss)(b) | 7 |  |  | — |  |  | 5 |  |  | — |
Included in regulatory assets and liabilities | 1 |  |  | 1 |  |  | (1 | ) |  | (1 | )
Purchases | 94 |  |  | — |  |  | 125 |  |  | — |
Settlements | (265 | ) |  | 23 |  |  | (1 | ) |  | (2 | )
Issuances | (64 | ) |  | — |  |  | (80 | ) |  | — |
Impact of adoption of revenue standard | — |  |  | — |  |  | (30 | ) |  | — |
Transfers in(c) | — |  |  | — |  |  | 1 |  |  | 1 |
Transfers out(c) | (32 | ) |  | 2 |  |  | 22 |  |  | — |
Fair value of net derivatives based on significant unobservable inputs at September 30 | $ | 1,051 |  |  | $ | (10 | ) |  | $ | 528 |  |  | $ | (2 | )
Gains (losses) included in earnings attributable to the change in unrealized gains (losses) relating to derivatives held at the reporting date(d) | $ | 476 |  |  | $ | — |  |  | $ | (68 | ) |  | $ | — |
———————————————
(a) | For the nine months ended September 30, 2019 and 2018, realized and unrealized gains (losses) of approximately $680 million and $(63) million, respectively, are included in the condensed consolidated statements of income in operating revenues and the balance is included in interest expense.
(b) | Included in net unrealized gains (losses) on foreign currency translation in the condensed consolidated statements of comprehensive income.
(c) | Transfers into Level 3 were a result of decreased observability of market data and transfers from Level 3 to Level 2 were a result of increased observability of market data. NEE's and FPL's policy is to recognize all transfers at the beginning of the reporting period.
(d) | For the nine months ended September 30, 2019 and 2018, unrealized gains (losses) of approximately $493 million and $(53) million, respectively, are included in the condensed consolidated statements of income in operating revenues and the balance is included in interest expense.
Fair Value of Financial Instruments Recorded at Other than Fair Value - The carrying amounts of commercial paper and other short-term debt approximate their fair values. The carrying amounts and estimated fair values of other financial instruments recorded at other than fair value are as follows:
| September 30, 2019 |  | December 31, 2018 |
| Carrying Amount |  | Estimated Fair Value |  | Carrying Amount |  | Estimated Fair Value |
| (millions) |
NEE: |  |
Special use funds(a) | $ | 958 |  |  | $ | 957 |  |  | $ | 884 |  |  | $ | 883 |  |
Other investments(b) | $ | 30 |  |  | $ | 30 |  |  | $ | 54 |  |  | $ | 54 |  |
Long-term debt, including current portion | $ | 39,032 |  |  | $ | 42,362 |  | (c) | $ | 29,498 |  |  | $ | 30,043 |  | (c)
FPL: |  |  |  |  |  |  |  |
Special use funds(a) | $ | 767 |  |  | $ | 766 |  |  | $ | 693 |  |  | $ | 692 |  |
Long-term debt, including current portion | $ | 14,171 |  |  | $ | 16,567 |  | (c) | $ | 11,783 |  |  | $ | 12,613 |  | (c)
———————————————
(a) | Primarily represents investments accounted for under the equity method and loans not measured at fair value on a recurring basis (Level 2).
(b) | Included in noncurrent other assets in the condensed consolidated balance sheets.
(c) | At September 30, 2019 and December 31, 2018, substantially all is Level 2 for NEE and all is Level 2 for FPL.
Special Use Funds - The special use funds noted above and those carried at fair value (see Recurring Fair Value Measurements above) consist of NEE's nuclear decommissioning fund assets of approximately $6,564 million and $5,818 million at September 30, 2019 and December 31, 2018, respectively, ($4,499 million and $3,987 million, respectively, for FPL) and FPL's storm fund assets of $70 million and $68 million at September 30, 2019 and December 31, 2018, respectively. The investments held in the special use funds consist of equity securities and available for sale debt securities which are primarily carried at estimated fair value. The amortized cost of debt securities is approximately $1,962 million and $1,994 million at September 30, 2019 and December 31, 2018, respectively, ($1,457 million and $1,542 million, respectively, for FPL). For FPL's special use funds, consistent with regulatory treatment, changes in fair value, including any other than temporary impairment losses, result in a corresponding adjustment to the related regulatory asset or liability accounts. For NEE's non-rate regulated operations, changes in fair value of debt securities result in a corresponding adjustment to OCI, except for unrealized losses considered to be other than temporary, including any credit losses, which are recognized in other - net in NEE's condensed consolidated statements of income. For NEE's non-rate regulated operations, changes in fair value of equity securities are recorded in change in unrealized gains (losses) on equity securities held in NEER's nuclear decommissioning funds - net in NEE’s condensed consolidated statements of income. The unrealized gains (losses) recognized during the three months ended September 30, 2019 and 2018 on equity securities held at September 30, 2019 and 2018 were $21 million and $192 million, respectively ($18 million and $130 million for three months ended September 30, 2019 and 2018, respectively, for FPL). The unrealized gains (losses) recognized during the nine months ended September 30, 2019 and 2018 on equity securities held at September 30, 2019 and 2018 were $500 million and $226 million, respectively ($327 million and $167 million for the nine months ended September 30, 2019 and 2018 for FPL). Debt securities included in the nuclear decommissioning funds have a weighted-average maturity at September 30, 2019 of approximately eight years at both NEE and FPL. FPL's storm fund primarily consists of debt securities with a weighted-average maturity at September 30, 2019 of approximately one year. The cost of securities sold is determined using the specific identification method. Realized gains and losses and proceeds from the sale or maturity of available for sale securities are as follows:
| NEE |  | FPL
| Three Months Ended September 30, |  | Nine Months Ended September 30, |  | Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018
| (millions)
Realized gains | $ | 21 |  |  | $ | 5 |  |  | $ | 47 |  |  | $ | 32 |  |  | $ | 15 |  |  | $ | 2 |  |  | $ | 30 |  |  | $ | 22 |
Realized losses | $ | 14 |  |  | $ | 9 |  |  | $ | 34 |  |  | $ | 49 |  |  | $ | 11 |  |  | $ | 5 |  |  | $ | 20 |  |  | $ | 34 |
Proceeds from sale or maturity of securities | $ | 612 |  |  | $ | 576 |  |  | $ | 2,087 |  |  | $ | 1,889 |  |  | $ | 489 |  |  | $ | 487 |  |  | $ | 1,717 |  |  | $ | 1,529 |
The unrealized gains and unrealized losses on available for sale debt securities and the fair value of available for sale debt securities in an unrealized loss position are as follows:
| NEE |  | FPL
| September 30, 2019 |  | December 31, 2018 |  | September 30, 2019 |  | December 31, 2018
| (millions)
Unrealized gains | $ | 88 |  |  | $ | 14 |  |  | $ | 68 |  |  | $ | 11 |
Unrealized losses(a) | $ | 9 |  |  | $ | 52 |  |  | $ | 8 |  |  | $ | 41 |
Fair value | $ | 264 |  |  | $ | 1,273 |  |  | $ | 191 |  |  | $ | 961 |
———————————————
(a) | Unrealized losses on available for sale debt securities in an unrealized loss position for greater than twelve months at September 30, 2019 and December 31, 2018 were not material to NEE or FPL.
Regulations issued by the FERC and the NRC provide general risk management guidelines to protect nuclear decommissioning funds and to allow such funds to earn a reasonable return. The FERC regulations prohibit, among other investments, investments in any securities of NEE or its subsidiaries, affiliates or associates, excluding investments tied to market indices or mutual funds. Similar restrictions applicable to the decommissioning funds for NEER's nuclear plants are included in the NRC operating licenses for those facilities or in NRC regulations applicable to NRC licensees not in cost-of-service environments. With respect to the decommissioning fund for Seabrook, decommissioning fund contributions and withdrawals are also regulated by the New Hampshire Nuclear Decommissioning Financing Committee pursuant to New Hampshire law. The nuclear decommissioning reserve funds are managed by investment managers who must comply with the guidelines of NEE and FPL and the rules of the applicable regulatory authorities. The funds' assets are invested giving consideration to taxes, liquidity, risk, diversification and other prudent investment objectives.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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