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

No definition available.

Name:	nee_ElectricDistributionAssetsToGrossInvestmentInElectricUtilityPlantInService
Namespace Prefix:	nee_
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Period Type:	instant

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
Namespace Prefix:	nee_
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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
Namespace Prefix:	nee_
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Carrying amount at the balance sheet date for long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, physical structures, machinery, vehicles, furniture, computer equipment, and similar items. Amount does not include construction in progress or depreciation.

No definition available.

Name:	nee_ElectricUtilityPlantInServiceAndOtherProperty
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Period Type:	instant

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
Namespace Prefix:	nee_
Data Type:	num:percentItemType
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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
Namespace Prefix:	nee_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The carrying amount, at gross, as of the balance sheet of nuclear fuel held as property plant and equipment.

No definition available.

Name:	nee_NuclearFuel
Namespace Prefix:	nee_
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Period Type:	instant

Percentage of depreciable electric plant in service and other property by plant type

No definition available.

Name:	nee_Percentageofgrossdepreciableassetsbyplanttype
Namespace Prefix:	nee_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

No definition available.

Name:	nee_PublicUtilitiesPropertyPlantAndEquipmentPlantInServiceGross
Namespace Prefix:	nee_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Reserve Amortization (Reversal) Recognized

No definition available.

Name:	nee_ReserveAmortizationReversalRecognized
Namespace Prefix:	nee_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

Name:	us-gaap_ConstructionInProgressGross
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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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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

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

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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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The period end amount of construction work in progress at a jointly owned electricity generation plant.

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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.

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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.

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Data Type:	num:percentItemType
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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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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
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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.

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Effective rate, including composite rate, of cost of financing additions to qualifying regulated assets, commonly called allowance for funds used during construction.

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Name:	us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate
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Period end book value of accumulated depreciation on property, plant and equipment (PPE) that is owned by the regulated operations of the public utility.

No definition available.

Name:	us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
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Data Type:	xbrli:monetaryItemType
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Period end amount of construction work in progress in public utility.

No definition available.

Name:	us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
Namespace Prefix:	us-gaap_
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:	num:percentItemType
Balance Type:	na
Period Type:	duration

Period end amount of property, plant and equipment (PPE) related to fuels owned by the public utility.

No definition available.

Name:	us-gaap_PublicUtilitiesPropertyPlantAndEquipmentFuel
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period end amount of total net PPE.

No definition available.

Name:	us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
Namespace Prefix:	us-gaap_
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Name:	dei_LegalEntityAxis=nee_NexteraEnergyResourcesMember
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Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=nee_SolarplantsMember
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Data Type:	na
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Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OilAndGasPropertiesMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_NuclearPlantMember
Namespace Prefix:
Data Type:	na
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Namespace Prefix:
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