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Fair Value Measurement (Tables) | 9 Months Ended
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Sep. 30, 2018
Fair Value Disclosures [Abstract] |
Financial assets and liabilities and other fair value measurements | 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, 2018 |
| Level 1 |  | Level 2 |  | Level 3 |  | Netting(a) |  | Total |
| (millions) |
Assets: |  |  |  |  |  |  |  |  |  |
Cash equivalents and restricted cash equivalents:(b) |  |  |  |  |  |  |  |  |  |
NEE - equity securities | $ | 255 |  |  | $ | — |  |  | $ | — |  |  |  |  | $ | 255 |  |
FPL - equity securities | $ | 167 |  |  | $ | — |  |  | $ | — |  |  |  |  | $ | 167 |  |
Special use funds:(c) |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Equity securities | $ | 1,687 |  |  | $ | 1,873 |  | (d) | $ | — |  |  |  |  | $ | 3,560 |  |
U.S. Government and municipal bonds | $ | 479 |  |  | $ | 155 |  |  | $ | — |  |  |  |  | $ | 634 |  |
Corporate debt securities | $ | 1 |  |  | $ | 725 |  |  | $ | — |  |  |  |  | $ | 726 |  |
Mortgage-backed securities | $ | — |  |  | $ | 428 |  |  | $ | — |  |  |  |  | $ | 428 |  |
Other debt securities | $ | — |  |  | $ | 146 |  |  | $ | — |  |  |  |  | $ | 146 |  |
FPL: |  |  |  |  |  |  |  |  |  |
Equity securities | $ | 478 |  |  | $ | 1,701 |  | (d) | $ | — |  |  |  |  | $ | 2,179 |  |
U.S. Government and municipal bonds | $ | 380 |  |  | $ | 120 |  |  | $ | — |  |  |  |  | $ | 500 |  |
Corporate debt securities | $ | — |  |  | $ | 548 |  |  | $ | — |  |  |  |  | $ | 548 |  |
Mortgage-backed securities | $ | — |  |  | $ | 319 |  |  | $ | — |  |  |  |  | $ | 319 |  |
Other debt securities | $ | — |  |  | $ | 130 |  |  | $ | — |  |  |  |  | $ | 130 |  |
Other investments:(e) |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Equity securities | $ | 16 |  |  | $ | 12 |  |  | $ | — |  |  |  |  | $ | 28 |  |
Debt securities | $ | 44 |  |  | $ | 87 |  |  | $ | — |  |  |  |  | $ | 131 |  |
Derivatives: |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Commodity contracts | $ | 1,256 |  |  | $ | 1,617 |  |  | $ | 1,227 |  |  | $ | (2,431 | ) |  | $ | 1,669 |  | (f)
Interest rate contracts | $ | — |  |  | $ | 163 |  |  | $ | — |  |  | $ | (7 | ) |  | $ | 156 |  | (f)
Foreign currency contracts | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 13 |  |  | $ | 13 |  | (f)
FPL - commodity contracts | $ | — |  |  | $ | 2 |  |  | $ | 2 |  |  | $ | (1 | ) |  | $ | 3 |  | (f)
Liabilities: |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Commodity contracts | $ | 1,224 |  |  | $ | 1,341 |  |  | $ | 557 |  |  | $ | (2,355 | ) |  | $ | 767 |  | (f)
Interest rate contracts | $ | — |  |  | $ | 61 |  |  | $ | 142 |  |  | $ | (7 | ) |  | $ | 196 |  | (f)
Foreign currency contracts | $ | — |  |  | $ | 29 |  |  | $ | — |  |  | $ | 13 |  |  | $ | 42 |  | (f)
FPL - commodity contracts | $ | — |  |  | $ | — |  |  | $ | 4 |  |  | $ | (1 | ) |  | $ | 3 |  | (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 $79 million ($76 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.
| December 31, 2017 |
| Level 1 |  | Level 2 |  | Level 3 |  | Netting(a) |  | Total |
| (millions) |
Assets: |  |  |  |  |  |  |  |  |  |
Cash equivalents and restricted cash equivalents:(b) |  |  |  |  |  |  |  |  |  |
NEE - equity securities | $ | 1,294 |  |  | $ | — |  |  | $ | — |  |  |  |  | $ | 1,294 |  |
FPL - equity securities | $ | 144 |  |  | $ | — |  |  | $ | — |  |  |  |  | $ | 144 |  |
Special use funds:(c) |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Equity securities | $ | 1,595 |  |  | $ | 1,719 |  | (d) | $ | — |  |  |  |  | $ | 3,314 |  |
U.S. Government and municipal bonds | $ | 478 |  |  | $ | 139 |  |  | $ | — |  |  |  |  | $ | 617 |  |
Corporate debt securities | $ | 1 |  |  | $ | 764 |  |  | $ | — |  |  |  |  | $ | 765 |  |
Mortgage-backed securities | $ | — |  |  | $ | 435 |  |  | $ | — |  |  |  |  | $ | 435 |  |
Other debt securities | $ | — |  |  | $ | 129 |  |  | $ | — |  |  |  |  | $ | 129 |  |
FPL: |  |  |  |  |  |  |  |  |  |
Equity securities | $ | 473 |  |  | $ | 1,562 |  | (d) | $ | — |  |  |  |  | $ | 2,035 |  |
U.S. Government and municipal bonds | $ | 362 |  |  | $ | 112 |  |  | $ | — |  |  |  |  | $ | 474 |  |
Corporate debt securities | $ | — |  |  | $ | 539 |  |  | $ | — |  |  |  |  | $ | 539 |  |
Mortgage-backed securities | $ | — |  |  | $ | 333 |  |  | $ | — |  |  |  |  | $ | 333 |  |
Other debt securities | $ | — |  |  | $ | 116 |  |  | $ | — |  |  |  |  | $ | 116 |  |
Other investments:(e) |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Equity securities | $ | 2 |  |  | $ | 10 |  |  | $ | — |  |  |  |  | $ | 12 |  |
Debt securities | $ | 34 |  |  | $ | 103 |  |  | $ | — |  |  |  |  | $ | 137 |  |
Derivatives: |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Commodity contracts | $ | 1,303 |  |  | $ | 1,301 |  |  | $ | 1,358 |  |  | $ | (2,225 | ) |  | $ | 1,737 |  | (f)
Interest rate contracts | $ | — |  |  | $ | 50 |  |  | $ | — |  |  | $ | 5 |  |  | $ | 55 |  | (f)
Foreign currency contracts | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 12 |  |  | $ | 12 |  | (f)
FPL - commodity contracts | $ | — |  |  | $ | 1 |  |  | $ | 2 |  |  | $ | (1 | ) |  | $ | 2 |  | (f)
Liabilities: |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |  |
Commodity contracts | $ | 1,217 |  |  | $ | 915 |  |  | $ | 660 |  |  | $ | (2,225 | ) |  | $ | 567 |  | (f)
Interest rate contracts | $ | — |  |  | $ | 143 |  |  | $ | 132 |  |  | $ | 5 |  |  | $ | 280 |  | (f)
Foreign currency contracts | $ | — |  |  | $ | 40 |  |  | $ | — |  |  | $ | 12 |  |  | $ | 52 |  | (f)
FPL - commodity contracts | $ | — |  |  | $ | 1 |  |  | $ | 2 |  |  | $ | (1 | ) |  | $ | 2 |  | (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 $159 million ($128 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 valuation of contracts categorized as Level 3 | 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, 2018 are as follows:
|  | Fair Value at |  | Valuation |  | Significant |  |  |  |
Transaction Type |  | September 30, 2018 |  | Technique(s) |  | Unobservable Inputs |  | Range
|  | Assets |  | Liabilities |  |  |  |  |  |  |  |
|  | (millions) |  |  |  |  |  |  |  |
Forward contracts - power |  | $ | 813 |  |  | $ | 265 |  |  | Discounted cash flow |  | Forward price (per MWh) |  | $(27) | — | $161
Forward contracts - gas |  | 26 |  |  | 13 |  |  | Discounted cash flow |  | Forward price (per MMBtu) |  | $2 | — | $7
Options - power |  | 51 |  |  | 21 |  |  | Option models |  | Implied correlations |  | 1% | — | 100%
|  |  |  |  |  |  |  | Implied volatilities |  | 7% | — | 197%
Options - primarily gas |  | 143 |  |  | 153 |  |  | Option models |  | Implied correlations |  | 1% | — | 100%
|  |  |  |  |  |  |  | Implied volatilities |  | 1% | — | 110%
Full requirements and unit contingent contracts |  | 194 |  |  | 105 |  |  | Discounted cash flow |  | Forward price (per MWh) |  | $(17) | — | $561
|  |  |  |  |  |  |  | Customer migration rate(a) |  | —% | — | 20%
Total |  | $ | 1,227 |  |  | $ | 557 |  |  |  |  |  |  |  |  |
———————————————
(a) | Applies only to full requirements contracts.
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation | 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.
Reconciliation of changes in the fair value measured based on significant unobservable inputs | 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,
| 2018 |  | 2017
| NEE |  | FPL |  | NEE |  | FPL
| (millions)
Fair value of net derivatives based on significant unobservable inputs at June 30 | $ | 650 |  |  | $ | — |  |  | $ | 724 |  |  | $ | (2 | )
Realized and unrealized gains (losses): |  |  |  |  |  |  |  |  |  |  |
Included in earnings(a) | (131 | ) |  | — |  |  | 158 |  |  | — |
Included in other comprehensive income(b) | 1 |  |  | — |  |  | (5 | ) |  | — |
Included in regulatory assets and liabilities | (1 | ) |  | (1 | ) |  | — |  |  | — |
Purchases | 22 |  |  | — |  |  | 38 |  |  | — |
Settlements | 6 |  |  | (1 | ) |  | (77 | ) |  | 1 |
Issuances | (19 | ) |  | — |  |  | (59 | ) |  | — |
Transfers out(c) | — |  |  | — |  |  | 1 |  |  | — |
Fair value of net derivatives based on significant unobservable inputs at September 30 | $ | 528 |  |  | $ | (2 | ) |  | $ | 780 |  |  | $ | (1 | )
Gains (losses) included in earnings attributable to the change in unrealized gains (losses) relating to derivatives held at the reporting date(d) | $ | (115 | ) |  | $ | — |  |  | $ | 213 |  |  | $ | — |
———————————————
(a) | For the three months ended September 30, 2018 and 2017, realized and unrealized gains (losses) of approximately $(134) million and $164 million, respectively, are included in the condensed consolidated statements of income in operating revenues and the balance is primarily 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, 2018 and 2017, unrealized gains (losses) of approximately $(118) million and $219 million, respectively, are included in the condensed consolidated statements of income in operating revenues and the balance is primarily included in interest expense.
| Nine Months Ended September 30,
| 2018 |  | 2017
| NEE |  | FPL |  | NEE |  | FPL
| (millions)
Fair value of net derivatives based on significant unobservable inputs at December 31 of prior period | $ | 566 |  |  | $ | — |  |  | $ | 578 |  |  | $ | 1 |
Realized and unrealized gains (losses): |  |  |  |  |  |  |  |  |  |  |
Included in earnings(a) | (79 | ) |  | — |  |  | 518 |  |  | — |
Included in other comprehensive income(b) | 5 |  |  | — |  |  | (16 | ) |  | — |
Included in regulatory assets and liabilities | (1 | ) |  | (1 | ) |  | (2 | ) |  | (2 | )
Purchases | 125 |  |  | — |  |  | 83 |  |  | — |
Settlements | (1 | ) |  | (2 | ) |  | (234 | ) |  | — |
Issuances | (80 | ) |  | — |  |  | (162 | ) |  | — |
Impact of adoption of new revenue standard(c) | (30 | ) |  | — |  |  | — |  |  | — |
Transfers in(d) | 1 |  |  | 1 |  |  | 14 |  |  | — |
Transfers out(d) | 22 |  |  | — |  |  | 1 |  |  | — |
Fair value of net derivatives based on significant unobservable inputs at September 30 | $ | 528 |  |  | $ | (2 | ) |  | $ | 780 |  |  | $ | (1 | )
Gains (losses) included in earnings attributable to the change in unrealized gains (losses) relating to derivatives held at the reporting date(e) | $ | (68 | ) |  | $ | — |  |  | $ | 461 |  |  | $ | — |
———————————————
(a) | For the nine months ended September 30, 2018 and 2017, realized and unrealized gains (losses) of approximately $(63) million and $519 million, respectively, are included in the condensed consolidated statements of income in operating revenues and the balance is primarily included in interest expense.
(b) | Included in net unrealized gains (losses) on foreign currency translation in the condensed consolidated statements of comprehensive income.
(c) | See Note 1.
(d) | 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.
(e) | For the nine months ended September 30, 2018 and 2017, unrealized gains (losses) of approximately $(53) million and $462 million, respectively, are included in the condensed consolidated statements of income in operating revenues and the balance is primarily included in interest expense.
Fair Value, by Balance Sheet Grouping | 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, 2018 |  | December 31, 2017 |
| Carrying Amount |  | Estimated Fair Value |  | Carrying Amount |  | Estimated Fair Value |
| (millions) |
NEE: |  |
Special use funds(a) | $ | 867 |  |  | $ | 867 |  |  | $ | 743 |  |  | $ | 744 |  |
Other investments - primarily notes receivable(b) | $ | 30 |  |  | $ | 30 |  |  | $ | 500 |  |  | $ | 680 |  |
Long-term debt, including current maturities | $ | 29,694 |  |  | $ | 30,326 |  | (c) | $ | 33,134 |  |  | $ | 35,447 |  | (c)
FPL: |  |  |  |  |  |  |  |
Special use funds(a) | $ | 688 |  |  | $ | 688 |  |  | $ | 593 |  |  | $ | 593 |  |
Long-term debt, including current maturities | $ | 11,691 |  |  | $ | 12,438 |  | (c) | $ | 11,702 |  |  | $ | 13,285 |  | (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. At December 31, 2017, primarily a note receivable (Level 3) classified as held for sale and under contract, along with debt secured by this note receivable (see Note 8 - NEER).
(c) | At September 30, 2018 and December 31, 2017, substantially all is Level 2 for NEE and all is Level 2 for FPL.
Available-for-sale Securities | 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,
| 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
| (millions)
Realized gains | $ | 5 |  |  | $ | 29 |  |  | $ | 32 |  |  | $ | 106 |  |  | $ | 2 |  |  | $ | 9 |  |  | $ | 22 |  |  | $ | 35 |
Realized losses | $ | 9 |  |  | $ | 15 |  |  | $ | 49 |  |  | $ | 58 |  |  | $ | 5 |  |  | $ | 8 |  |  | $ | 34 |  |  | $ | 34 |
Proceeds from sale or maturity of securities | $ | 576 |  |  | $ | 518 |  |  | $ | 1,889 |  |  | $ | 1,772 |  |  | $ | 487 |  |  | $ | 329 |  |  | $ | 1,529 |  |  | $ | 1,166 |
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, 2018 |  | December 31, 2017 |  | September 30, 2018 |  | December 31, 2017
| (millions)
Unrealized gains | $ | 8 |  |  | $ | 37 |  |  | $ | 6 |  |  | $ | 28 |
Unrealized losses(a) | $ | 47 |  |  | $ | 12 |  |  | $ | 37 |  |  | $ | 9 |
Fair value | $ | 1,626 |  |  | $ | 918 |  |  | $ | 1,253 |  |  | $ | 670 |
———————————————
(a) | Unrealized losses on available for sale debt securities in an unrealized loss position for greater than twelve months at September 30, 2018 and December 31, 2017 were not material to NEE or FPL

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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19279-110258 + Details
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- Definition Tabular disclosure of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) using recurring unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19279-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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