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v3.19.3.a.u2

Debt (Narrative) (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 31, 2020 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Aug. 31, 2019 | Aug. 31, 2018
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Weighted-average interest rate of commercial paper and short-tem borrowings (in hundredths) |  |  |  | 1.95% | 2.95% |  |  |
Line of Credit [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Available capacity |  |  |  | $ 10,800,000,000 |  |  |  |
Letter of Credit [Member] | Line of Credit [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Available capacity |  |  |  | 100,000,000 |  |  |  |
Revolving Credit Facility [Member] | Line of Credit [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Available capacity |  |  |  | 10,700,000,000 |  |  |  |
Revolving Credit Facility, Issuance of Letters of Credit [Member] | Line of Credit [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Available capacity |  |  |  | $ 2,300,000,000 |  |  |  |
FPL[Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Weighted-average interest rate of commercial paper and short-tem borrowings (in hundredths) |  |  |  | 1.80% | 2.87% |  |  |
Repayments of Debt |  |  |  | $ 250,000,000 | $ 1,785,000,000 | $ 0 |  |
FPL[Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Repayments of Debt | $ 1,200,000,000 |  |  |  |  |  |  |
FPL[Member] | Line of Credit [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Available capacity |  |  |  | 3,600,000,000 |  |  |  |
FPL[Member] | Letter of Credit [Member] | Line of Credit [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Available capacity |  |  |  | 0 |  |  |  |
FPL[Member] | Revolving Credit Facility [Member] | Line of Credit [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Available capacity |  |  |  | 3,600,000,000 |  |  |  |
FPL[Member] | Revolving Credit Facility, Issuance of Letters of Credit [Member] | Line of Credit [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Available capacity |  |  |  | $ 600,000,000 |  |  |  |
NEE Equity Units 2019 [Member] |  |  |  |  |  |  |  |
Sale of equity units [Abstract] |  |  |  |  |  |  |  |
Amount of equity units sold |  | $ 1,500,000,000 |  |  |  |  |  |
Stated amount of each equity unit (in dollars per share) |  | $ 50 |  |  |  |  |  |
Undivided beneficial ownership interest per debenture (in hundredths) |  | 5.00% |  |  |  |  |  |
Principal amount of each debenture |  | $ 1,000 |  |  |  |  |  |
Number of shares (subject to antidilution adjustments) if purchased on final settlement date at less than or equal to low range threshold (in shares) |  |  |  | 0.2231 |  |  |  |
Number of shares (subject to antidilution adjustments) if purchased on the final settlement date at equal to or greater than high range threshold (in shares) |  |  |  | 0.1785 |  |  |  |
Trading period (in days) over which the market value is determined by reference to the average closing prices of the common stock |  |  |  | 20 days |  |  |  |
Rate of total annual distributions on equity units (in hundredths) |  |  |  | 4.872% |  |  |  |
Interest rate |  |  |  | 2.10% |  |  |  |
Rate of payments on stock purchase contracts (in hundredths) |  |  |  | 2.772% |  |  |  |
NEE Equity Units 2019 [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Sale of equity units [Abstract] |  |  |  |  |  |  |  |
Price per share of stock purchase contract (in dollars per share) |  | $ 224.12 |  | $ 224.12 |  |  |  |
NEE Equity Units 2019 [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Sale of equity units [Abstract] |  |  |  |  |  |  |  |
Price per share of stock purchase contract (in dollars per share) |  | $ 280.15 |  | $ 280.15 |  |  |  |
Series H Debentures Due September 1, 2020 [Member] | NextEra Energy Capital Holdings, Inc. [Member] | Debentures [Member] |  |  |  |  |  |  |  |
Sale of equity units [Abstract] |  |  |  |  |  |  |  |
Interest rate |  |  |  |  | 3.342% |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  | $ 700,000,000
Series I Debentures Due September 1, 2021 [Member] | NextEra Energy Capital Holdings, Inc. [Member] | Debentures [Member] |  |  |  |  |  |  |  |
Sale of equity units [Abstract] |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  | 2.403% |
Debt Instrument, Face Amount |  |  |  |  |  |  | $ 1,500,000,000 |
September 2015 Equity Units [Member] |  |  |  |  |  |  |  |
Sale of equity units [Abstract] |  |  |  |  |  |  |  |
Sale of Stock, Number of Shares Issued in Transaction |  |  | 6,215,998 |  |  |  |  |
Sale of Stock, Consideration Received on Transaction |  |  | $ 700,000,000 |  |  |  |  |
August 2016 Equity Units [Member] |  |  |  |  |  |  |  |
Sale of equity units [Abstract] |  |  |  |  |  |  |  |
Sale of Stock, Number of Shares Issued in Transaction |  | 9,543,000 |  |  |  |  |  |
Sale of Stock, Consideration Received on Transaction |  | $ 1,500,000,000 |  |  |  |  |  |

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