Commitments and Contingencies (Planned Capital Expenditures) (Details) $ in Millions	9 Months Ended
Sep. 30, 2026 USD ($) MW
Planned Capital Expenditures [Line Items]
Guarantor obligations, current carrying value	$ 849
Florida Power & Light Company
Planned Capital Expenditures [Line Items]
Remainder of 2026	3,640
2027	11,705
2028	11,285
2029	13,085
2030	13,295
Total	53,010
NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	5,710
2027	17,720
2028	11,575
2029	2,495
2030	4,015
Total	41,515
New Generation Expenditures [Member] \| Florida Power & Light Company
Planned Capital Expenditures [Line Items]
Remainder of 2026	1,460
2027	4,330
2028	4,010
2029	4,820
2030	4,225
Total	18,845
Allowance for funds used during construction (AFUDC) - remainder of 2026	50
Allowance for funds used during construction (AFUDC) - 2027	265
Allowance for funds used during construction (AFUDC) - 2028	245
Allowance for funds used during construction (AFUDC) - 2029	275
Allowance for funds used during construction (AFUDC) - 2030	235
Existing Generation Expenditures [Member] \| Florida Power & Light Company
Planned Capital Expenditures [Line Items]
Remainder of 2026	345
2027	1,360
2028	1,300
2029	1,300
2030	1,350
Total	5,655
Transmission And Distribution Expenditures [Member] \| Florida Power & Light Company
Planned Capital Expenditures [Line Items]
Remainder of 2026	1,215
2027	4,910
2028	4,775
2029	5,900
2030	6,720
Total	23,520
Allowance for funds used during construction (AFUDC) - remainder of 2026	20
Allowance for funds used during construction (AFUDC) - 2027	95
Allowance for funds used during construction (AFUDC) - 2028	105
Allowance for funds used during construction (AFUDC) - 2029	165
Allowance for funds used during construction (AFUDC) - 2030	160
Nuclear Fuel Expenditures [Member] \| Florida Power & Light Company
Planned Capital Expenditures [Line Items]
Remainder of 2026	130
2027	350
2028	460
2029	400
2030	380
Total	1,720
General And Other Expenditures [Member] \| Florida Power & Light Company
Planned Capital Expenditures [Line Items]
Remainder of 2026	490
2027	755
2028	740
2029	665
2030	620
Total	3,270
Wind Expenditures [Member] \| NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	200
2027	1,560
2028	2,805
2029	110
2030	90
Total	$ 4,765
Planned new generation over 5 year period (in megawatts) \| MW	3,486
Solar Expenditures [Member] \| NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	$ 2,980
2027	7,600
2028	4,085
2029	195
2030	280
Total	$ 15,140
Planned new generation over 5 year period (in megawatts) \| MW	15,877
Other Clean Energy Expenditures \| NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	$ 1,575
2027	5,665
2028	2,420
2029	85
2030	660
Total	$ 10,405
Planned new generation over 5 year period (in megawatts) \| MW	8,237
Nuclear Expenditures [Member] \| NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	$ 285
2027	1,110
2028	875
2029	500
2030	460
Total	3,230
Regulated Electric and Gas Transmission Expenditures [Member] \| NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	380
2027	1,265
2028	1,015
2029	1,200
2030	2,110
Total	5,970
Other Expenditures [Member] \| NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	290
2027	520
2028	375
2029	405
2030	415
Total	$ 2,005

Planned Capital Expenditures AFUDC Fifth Year

No definition available.

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

- Definition

Planned Capital Expenditures AFUDC Fourth Year

+ References

No definition available.

+ Details

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

- Definition

Estimated planned capital expenditures for the fifth year.

+ References

No definition available.

+ Details

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

- Definition

Estimated planned capital expenditures for the fourth year.

+ References

No definition available.

+ Details

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

- Definition

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.

+ References

No definition available.

+ Details

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

- Definition

Estimated planned capital expenditures for the remainder of the current year.

+ References

No definition available.

+ Details

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

- Definition

Estimated planned capital expenditures for the second year.

+ References

No definition available.

+ Details

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

- Definition

Estimated planned capital expenditures for the third year.

+ References

No definition available.

+ Details

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

- Definition

Estimated AFUDC for the remainder of the current year

+ References

No definition available.

+ Details

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

- Definition

Estimated AFUDC for the remainder of the second year.

+ References

No definition available.

+ Details

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

- Definition

Estimated AFUDC for the remainder of the third year

+ References

No definition available.

+ Details

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

- Definition

Planned New Generation To Be Added over 5 Years in Megawatts

+ References

No definition available.

+ Details

Name:	nee_PlannedNewGenerationToBeAddedover5Years
Namespace Prefix:	nee_
Data Type:	dtr-types:powerItemType
Balance Type:	na
Period Type:	duration

- Definition

Total estimated planned capital expenditures.

+ References

No definition available.

+ Details

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

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

+ Details

Name:	us-gaap_GuaranteeObligationsCurrentCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=nee_FloridaPowerLightCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=nee_NEERSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	nee_PlannedCapitalExpendituresByCommitmentAxis=nee_NewGenerationExpendituresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	nee_PlannedCapitalExpendituresByCommitmentAxis=nee_ExistingGenerationExpendituresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	nee_PlannedCapitalExpendituresByCommitmentAxis=nee_TransmissionAndDistributionExpendituresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	nee_PlannedCapitalExpendituresByCommitmentAxis=nee_NuclearFuelExpendituresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	nee_PlannedCapitalExpendituresByCommitmentAxis=nee_GeneralAndOtherExpendituresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	nee_PlannedCapitalExpendituresByCommitmentAxis=nee_WindExpendituresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	nee_PlannedCapitalExpendituresByCommitmentAxis=nee_SolarExpendituresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	nee_PlannedCapitalExpendituresByCommitmentAxis=nee_OtherCleanEnergyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	nee_PlannedCapitalExpendituresByCommitmentAxis=nee_NuclearExpendituresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	nee_PlannedCapitalExpendituresByCommitmentAxis=nee_RateRegulatedTransmissionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	nee_PlannedCapitalExpendituresByCommitmentAxis=nee_OtherExpendituresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: