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For FPL, this element represents the percentage of electric generating assets to gross investment in electric utility plant in service.

No definition available.

Name:	nee_ElectricGeneratingAssetsToGrossInvestmentInElectricUtilityPlantInService
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For FPL, this element represents the percentage of electric transmission assets to gross investment in electric utility plant in service.

No definition available.

Name:	nee_ElectricTransmissionAssetsToGrossInvestmentInElectricUtilityPlantInService
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For FPL, this element represents the percentage of general facilities assets to gross investment in electric utility plant in service.

No definition available.

Name:	nee_GeneralFacilitiesAssetsToGrossInvestmentInElectricUtilityPlantInService
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For NextEra Energy Resources, this element represents the net book value of assets which serve as collateral that secure various financings for electric generating facilities.

No definition available.

Name:	nee_NetBookValueOfAssetsServingAsCollateral
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Data Type:	xbrli:monetaryItemType
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Percentage of depreciable electric plant in service and other property by plant type

No definition available.

Name:	nee_Percentageofgrossdepreciableassetsbyplanttype
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Public Utilities, Allowance for Funds Used During Construction, Equity Component

No definition available.

Name:	nee_PublicUtilitiesAllowanceForFundsUsedDuringConstructionEquityComponent
Namespace Prefix:	nee_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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Reserve Amortization (Reversal) Recognized

No definition available.

Name:	nee_ReserveAmortizationReversalRecognized
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Data Type:	xbrli:monetaryItemType
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Amount of interest capitalized, including amount of allowance for funds used during construction.

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The period end amount owned by the reporting utility of a jointly owned utility plant in service.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 980
-SubTopic 360
-Name Accounting Standards Codification
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_JointlyOwnedUtilityPlantInterestsLineItems
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Data Type:	xbrli:stringItemType
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The period end amount of construction work in progress at a jointly owned electricity generation plant.

Name:	us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The period end amount of accumulated depreciation in a jointly owned electricity generation plant.

Name:	us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The proportionate share of interest (percent) in a jointly owned utility plant.

Name:	us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare
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Data Type:	dtr-types:percentItemType
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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

Total increase in earnings in the period representing the cost of equity (based on assumed rate of return) and/or borrowed funds (based on interest rate) used to finance construction of regulated assets, which is expected to be recovered through rate adjustments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Data Type:	xbrli:monetaryItemType
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Composite depreciation rate for public utility plants in service.

No definition available.

Name:	us-gaap_PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
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Name:	dei_LegalEntityAxis=nee_NexteraEnergyResourcesMember
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Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OilAndGasPropertiesMember
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