Name:	nee_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesNetOfTax
Namespace Prefix:	nee_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Tax expense (benefit) related to unrecognized gain (loss) included in accumulated other comprehensive income (loss) yet to be recognized as components of prepaid (accrued) benefit cost.

No definition available.

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

- References

No definition available.

Name:	nee_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetOfTaxAbstract
Namespace Prefix:	nee_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount related to the net of tax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost.

No definition available.

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

Tax expense (benefit) related to unrecognized prior service benefit (cost) included in accumulated other comprehensive income (loss) yet to be recognized as components of prepaid (accrued) benefit cost.

No definition available.

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

The amount of (gain) loss not yet recognized as a component of prepaid (accrued) benefit cost and is included in regulatory assets (liabilities).

No definition available.

Name:	nee_DefinedBenefitPlanRegulatoryAssetsLiabilitiesUnrecognizedGainsLosses
Namespace Prefix:	nee_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

Name:	nee_TaxEffectsOnComponentsOfAociAbstract
Namespace Prefix:	nee_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	nee_UnrecognizedAmountsIncludedInRegulatoryAssetsLiabilitiesAbstract
Namespace Prefix:	nee_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
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