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Derivative Instruments (Tables) | 12 Months Ended
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Dec. 31, 2020
Derivative [Line Items] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | Therefore, the tables below also present the derivative positions on a net basis, which reflect the offsetting of positions of certain transactions within the portfolio, the contractual ability to settle contracts under master netting arrangements and the netting of margin cash collateral, as well as the location of the net derivative position on the consolidated balance sheets.
| December 31, 2020
| Level 1 |  | Level 2 |  | Level 3 |  | Netting(a) |  | Total
| (millions)
Assets: |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |
Commodity contracts | $ | 919 |  |  | $ | 1,881 |  |  | $ | 1,679 |  |  | $ | (2,325) |  |  | $ | 2,154 |
Interest rate contracts | $ | — |  |  | $ | 81 |  |  | $ | — |  |  | $ | (41) |  |  | 40 |
Foreign currency contracts | $ | — |  |  | $ | 57 |  |  | $ | — |  |  | $ | (34) |  |  | 23 |
Total derivative assets |  |  |  |  |  |  |  |  | $ | 2,217 |
FPL - commodity contracts | $ | — |  |  | $ | 1 |  |  | $ | 2 |  |  | $ | — |  |  | $ | 3 |
Liabilities: |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |
Commodity contracts | $ | 1,004 |  |  | $ | 1,468 |  |  | $ | 305 |  |  | $ | (2,277) |  |  | $ | 500 |
Interest rate contracts | $ | — |  |  | $ | 1,042 |  |  | $ | — |  |  | $ | (41) |  |  | 1,001 |
Foreign currency contracts | $ | — |  |  | $ | 43 |  |  | $ | — |  |  | $ | (34) |  |  | 9 |
Total derivative liabilities |  |  |  |  |  |  |  |  | $ | 1,510 |
FPL - commodity contracts | $ | — |  |  | $ | — |  |  | $ | 3 |  |  | $ | — |  |  | $ | 3 |
Net fair value by NEE balance sheet line item: |  |  |  |  |  |  |  |  |
Current derivative assets |  |  |  |  |  |  |  |  | $ | 570 |
Noncurrent derivative assets(b) |  |  |  |  |  |  |  |  | 1,647 |
Total derivative assets |  |  |  |  |  |  |  |  | $ | 2,217 |
Current derivative liabilities(c) |  |  |  |  |  |  |  |  | $ | 311 |
Noncurrent derivative liabilities |  |  |  |  |  |  |  |  | 1,199 |
Total derivative liabilities |  |  |  |  |  |  |  |  | $ | 1,510 |
Net fair value by FPL balance sheet line item: |  |  |  |  |  |  |  |  |
Current other assets |  |  |  |  |  |  |  |  | $ | 3 |
Current other liabilities |  |  |  |  |  |  |  |  | $ | 2 |
Noncurrent other liabilities |  |  |  |  |  |  |  |  | 1 |
Total derivative liabilities |  |  |  |  |  |  |  |  | $ | 3 |
______________________ (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 consolidated balance sheets and are recorded in customer receivables - net and accounts payable, respectively. (b)Reflects the netting of approximately $184 million in margin cash collateral received from counterparties. (c)Reflects the netting of approximately $136 million in margin cash collateral paid to counterparties.
| December 31, 2019
| Level 1 |  | Level 2 |  | Level 3 |  | Netting(a) |  | Total
| (millions) |  |
Assets: |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |
Commodity contracts | $ | 1,229 |  |  | $ | 2,082 |  |  | $ | 1,739 |  |  | $ | (2,700) |  |  | $ | 2,350 |
Interest rate contracts | $ | — |  |  | $ | 24 |  |  | $ | 2 |  |  | $ | (17) |  |  | 9 |
Foreign currency contracts | $ | — |  |  | $ | 26 |  |  | $ | — |  |  | $ | 1 |  |  | 27 |
Total derivative assets |  |  |  |  |  |  |  |  | $ | 2,386 |
FPL - commodity contracts | $ | — |  |  | $ | 3 |  |  | $ | 1 |  |  | $ | (1) |  |  | $ | 3 |
Liabilities: |  |  |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |  |  |
Commodity contracts | $ | 1,365 |  |  | $ | 1,446 |  |  | $ | 390 |  |  | $ | (2,625) |  |  | $ | 576 |
Interest rate contracts | $ | — |  |  | $ | 598 |  |  | $ | 144 |  |  | $ | (17) |  |  | 725 |
Foreign currency contracts | $ | — |  |  | $ | 38 |  |  | $ | — |  |  | $ | 1 |  |  | 39 |
Total derivative liabilities |  |  |  |  |  |  |  |  | $ | 1,340 |
FPL - commodity contracts | $ | — |  |  | $ | 5 |  |  | $ | 9 |  |  | $ | (1) |  |  | $ | 13 |
Net fair value by NEE balance sheet line item: |  |  |  |  |  |  |  |  |
Current derivative assets(b) |  |  |  |  |  |  |  |  | $ | 762 |
Noncurrent derivative assets(c) |  |  |  |  |  |  |  |  | 1,624 |
Total derivative assets |  |  |  |  |  |  |  |  | $ | 2,386 |
Current derivative liabilities(d) |  |  |  |  |  |  |  |  | $ | 344 |
Current other liabilities(e) |  |  |  |  |  |  |  |  | 133 |
Noncurrent derivative liabilities |  |  |  |  |  |  |  |  | 863 |
Total derivative liabilities |  |  |  |  |  |  |  |  | $ | 1,340 |
Net fair value by FPL balance sheet line item: |  |  |  |  |  |  |  |  |
Current other assets |  |  |  |  |  |  |  |  | $ | 3 |
Current other liabilities |  |  |  |  |  |  |  |  | $ | 12 |
Noncurrent other liabilities |  |  |  |  |  |  |  |  | 1 |
Total derivative liabilities |  |  |  |  |  |  |  |  | $ | 13 |
______________________ (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 consolidated balance sheets and are recorded in customer receivables - net and accounts payable, respectively. (b)Reflects the netting of approximately $2 million in margin cash collateral received from counterparties. (c)Reflects the netting of approximately $139 million in margin cash collateral received from counterparties. (d)Reflects the netting of approximately $66 million in margin cash collateral paid to counterparties. (e)See Note 1 - Disposal of Businesses/Assets. NEE's and FPL's financial assets and other fair value measurements made on a recurring basis by fair value hierarchy level are as follows:
| December 31, 2020
| Level 1 |  | Level 2 |  | Level 3 |  | Total
| (millions)
Assets: |  |  |  |  |  |  |
Cash equivalents and restricted cash equivalents:(a) |  |  |  |  |  |  |
NEE - equity securities | $ | 742 |  |  | $ | — |  |  | $ | — |  |  | $ | 742 |
FPL - equity securities | $ | 78 |  |  | $ | — |  |  | $ | — |  |  | $ | 78 |
Special use funds:(b) |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |
Equity securities | $ | 2,237 |  |  | $ | 2,489 |  | (c) | $ | — |  |  | $ | 4,726 |
U.S. Government and municipal bonds | $ | 590 |  |  | $ | 127 |  |  | $ | — |  |  | $ | 717 |
Corporate debt securities | $ | 1 |  |  | $ | 870 |  |  | $ | — |  |  | $ | 871 |
Mortgage-backed securities | $ | — |  |  | $ | 422 |  |  | $ | — |  |  | $ | 422 |
Other debt securities | $ | — |  |  | $ | 124 |  |  | $ | — |  |  | $ | 124 |
FPL: |  |  |  |  |  |  |
Equity securities | $ | 752 |  |  | $ | 2,260 |  | (c) | $ | — |  |  | $ | 3,012 |
U.S. Government and municipal bonds | $ | 449 |  |  | $ | 87 |  |  | $ | — |  |  | $ | 536 |
Corporate debt securities | $ | — |  |  | $ | 627 |  |  | $ | — |  |  | $ | 627 |
Mortgage-backed securities | $ | — |  |  | $ | 335 |  |  | $ | — |  |  | $ | 335 |
Other debt securities | $ | — |  |  | $ | 119 |  |  | $ | — |  |  | $ | 119 |
Other investments:(d) |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |
Equity securities | $ | 62 |  |  | $ | — |  |  | $ | — |  |  | $ | 62 |
Debt securities | $ | 91 |  |  | $ | 127 |  |  | $ | — |  |  | $ | 218 |
______________________ (a)Includes restricted cash equivalents of approximately $111 million ($56 million for FPL) in current other assets and $42 million ($17 million for FPL) in noncurrent other assets on the consolidated balance sheets. (b)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. (c)Primarily invested in commingled funds whose underlying securities would be Level 1 if those securities were held directly by NEE or FPL. (d)Included in noncurrent other assets on NEE's consolidated balance sheet.
| December 31, 2019
| Level 1 |  | Level 2 |  | Level 3 |  | Total
| (millions)
Assets: |  |  |  |  |  |  |
Cash equivalents and restricted cash equivalents:(a) |  |  |  |  |  |  |
NEE - equity securities | $ | 363 |  |  | $ | — |  |  | $ | — |  |  | $ | 363 |
FPL - equity securities | $ | 156 |  |  | $ | — |  |  | $ | — |  |  | $ | 156 |
Special use funds:(b) |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |
Equity securities | $ | 1,875 |  |  | $ | 2,088 |  | (c) | $ | — |  |  | $ | 3,963 |
U.S. Government and municipal bonds | $ | 567 |  |  | $ | 150 |  |  | $ | — |  |  | $ | 717 |
Corporate debt securities | $ | — |  |  | $ | 748 |  |  | $ | — |  |  | $ | 748 |
Mortgage-backed securities | $ | — |  |  | $ | 517 |  |  | $ | — |  |  | $ | 517 |
Other debt securities | $ | — |  |  | $ | 117 |  |  | $ | — |  |  | $ | 117 |
FPL: |  |  |  |  |  |  |
Equity securities | $ | 596 |  |  | $ | 1,895 |  | (c) | $ | — |  |  | $ | 2,491 |
U.S. Government and municipal bonds | $ | 429 |  |  | $ | 106 |  |  | $ | — |  |  | $ | 535 |
Corporate debt securities | $ | — |  |  | $ | 533 |  |  | $ | — |  |  | $ | 533 |
Mortgage-backed securities | $ | — |  |  | $ | 395 |  |  | $ | — |  |  | $ | 395 |
Other debt securities | $ | — |  |  | $ | 111 |  |  | $ | — |  |  | $ | 111 |
Other investments:(d) |  |  |  |  |  |  |
NEE: |  |  |  |  |  |  |
Equity securities | $ | 34 |  |  | $ | 12 |  |  | $ | — |  |  | $ | 46 |
Debt securities | $ | 82 |  |  | $ | 69 |  |  | $ | — |  |  | $ | 151 |
______________________ (a)Includes restricted cash equivalents of approximately $60 million ($54 million for FPL) in current other assets and $64 million ($64 million for FPL) in noncurrent other assets on the consolidated balance sheets. (b)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. (c)Primarily invested in commingled funds whose underlying securities would be Level 1 if those securities were held directly by NEE or FPL. (d)Included in noncurrent other assets on NEE's consolidated balance sheet.
Fair Value Inputs, Assets, Quantitative Information | The significant unobservable inputs used in the valuation of NEE's commodity contracts categorized as Level 3 of the fair value hierarchy at December 31, 2020 are as follows:
Transaction Type |  | Fair Value at December 31, 2020 |  | Valuation Technique(s) |  | Significant Unobservable Inputs |  | Range |  | Weighted-average(a)
|  | Assets |  | Liabilities |  |  |  |  |  |  |  |  |  |
|  | (millions) |  |  |  |  |  |  |  |  |  |
Forward contracts - power |  | $ | 792 |  |  | $ | (1) |  |  | Discounted cash flow |  | Forward price (per MWh) |  | $— | — | $137 |  | $29
Forward contracts - gas |  | 305 |  |  | 25 |  |  | Discounted cash flow |  | Forward price (per MMBtu) |  | $1 | — | $8 |  | $3
Forward contracts - congestion |  | 27 |  |  | 7 |  |  | Discounted cash flow |  | Forward price (various) |  | $(6) | — | $30 |  | $—
Options - power |  | 35 |  |  | 10 |  |  | Option models |  | Implied correlations |  | 40% | — | 84% |  | 55%
|  |  |  |  |  |  |  | Implied volatilities |  | 5% | — | 357% |  | 84%
Options - primarily gas |  | 128 |  |  | 131 |  |  | Option models |  | Implied correlations |  | 40% | — | 96% |  | 55%
|  |  |  |  |  |  |  | Implied volatilities |  | 16% | — | 310% |  | 36%
Full requirements and unit contingent contracts |  | 363 |  |  | 121 |  |  | Discounted cash flow |  | Forward price (per MWh) |  | $5 | — | $330 |  | $46
|  |  |  |  |  |  |  | Customer migration rate(b) |  | —% | — | 122% |  | 2%
Forward contracts - other |  | 29 |  |  | 12 |  |  |  |  |  |  |  |  |  |  |
Total |  | $ | 1,679 |  |  | $ | 305 |  |  |  |  |  |  |  |  |  |  |
______________________ (a)Unobservable inputs were weighted by volume. (b)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 of derivatives 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:
| Years Ended December 31,
| 2020 |  | 2019 |  | 2018
| NEE |  | FPL |  | NEE |  | FPL |  | NEE |  | FPL
| (millions)
Fair value of net derivatives based on significant unobservable inputs at December 31 of prior year | $ | 1,207 |  |  | $ | (8) |  |  | $ | 647 |  |  | $ | (36) |  |  | $ | 566 |  |  | $ | — |
Realized and unrealized gains (losses): |  |  |  |  |  |  |  |  |  |  |
Included in earnings(a) | 547 |  |  | — |  |  | 923 |  |  | — |  |  | 35 |  |  | (1) |
Included in other comprehensive income (loss)(b) | 1 |  |  | — |  |  | 5 |  |  | — |  |  | 7 |  |  | — |
Included in regulatory assets and liabilities | 2 |  |  | 2 |  |  | 1 |  |  | 1 |  |  | (18) |  |  | (18) |
Purchases | 191 |  |  | — |  |  | 141 |  |  | — |  |  | 152 |  |  | (16) |
Sales(c) | 114 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Settlements | (562) |  |  | 6 |  |  | (356) |  |  | 25 |  |  | 28 |  |  | (2) |
Issuances | (123) |  |  | — |  |  | (87) |  |  | — |  |  | (115) |  |  | — |
Impact of adoption of revenue standard | — |  |  | — |  |  | — |  |  | — |  |  | (30) |  |  | — |
Transfers in(d) | 18 |  |  | (1) |  |  | (5) |  |  | — |  |  | — |  |  | — |
Transfers out(d) | (21) |  |  | — |  |  | (62) |  |  | 2 |  |  | 22 |  |  | 1 |
Fair value of net derivatives based on significant unobservable inputs at December 31 | $ | 1,374 |  |  | $ | (1) |  |  | $ | 1,207 |  |  | $ | (8) |  |  | $ | 647 |  |  | $ | (36) |
Gains (losses) included in earnings attributable to the change in unrealized gains (losses) relating to derivatives held at the reporting date(e) | $ | 317 |  |  | $ | — |  |  | $ | 611 |  |  | $ | — |  |  | $ | 100 |  |  | $ | (1) |
______________________ (a)For the years ended December 31, 2020, 2019 and 2018, realized and unrealized gains of approximately $569 million, $956 million and $48 million are included in the 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 consolidated statements of comprehensive income. (c)See Note 1 - Disposal of Businesses/Assets. (d)Transfers into Level 3 were a result of decreased observability of market data. Transfers from Level 3 to Level 2 were a result of increased observability of market data. (e)For the years ended December 31, 2020, 2019 and 2018, unrealized gains of approximately $317 million, $638 million and $112 million are included in the consolidated statements of income in operating revenues and the balance is included in interest expense.
Derivative instruments, gain (loss) in statement of financial performance | Gains (losses) related to NEE's derivatives are recorded in NEE's consolidated statements of income as follows:
| Years Ended December 31,
| 2020 |  | 2019 |  | 2018
| (millions)
Commodity contracts:(a) |  |  |  |  |
Operating revenues | $ | 352 |  |  | $ | 762 |  |  | $ | 377 |
Fuel, purchased power and interchange | — |  |  | — |  |  | (2) |
Foreign currency contracts - interest expense | 8 |  |  | (7) |  |  | 19 |
Interest rate contracts - interest expense | (421) |  |  | (699) |  |  | (280) |
Losses reclassified from AOCI: |  |  |  |  |
Interest rate contracts(b) | (35) |  |  | (32) |  |  | (30) |
Foreign currency contracts - interest expense | (3) |  |  | (4) |  |  | (4) |
Total | $ | (99) |  |  | $ | 20 |  |  | $ | 80 |
______________________ (a)For the years ended December 31, 2020, 2019 and 2018, FPL recorded gains (losses) of approximately $6 million, $9 million and $(31) million, respectively, related to commodity contracts as regulatory liabilities (assets) on its consolidated balance sheets.
Net notional volumes | NEE and FPL had derivative commodity contracts for the following net notional volumes:
|  | December 31, 2020 |  | December 31, 2019
Commodity Type |  | NEE |  | FPL |  | NEE |  | FPL
|  | (millions)
Power |  | (90) |  |  | MWh(a) |  | — |  |  |  |  | (81) |  |  | MWh(a) |  | 1 |  |  | MWh(a)
Natural gas |  | (607) |  |  | MMBtu(b) |  | 87 |  |  | MMBtu(b) |  | (1,723) |  |  | MMBtu(b) |  | 161 |  |  | MMBtu(b)
Oil |  | (6) |  |  | barrels |  | — |  |  |  |  | (13) |  |  | barrels |  | — |  |  |
______________________ (a)Megawatt-hours (b)One million British thermal units

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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period 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 asset. + 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 -URI http://asc.fasb.org/extlink&oid=117815213&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=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4E -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624181-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
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