Commitments and Contingencies (Planned Capital Expenditures) (Details) $ in Millions	3 Months Ended
Mar. 31, 2026 USD ($) MW
Planned Capital Expenditures [Line Items]
Guarantor obligations, current carrying value	$ 915
Florida Power & Light Company
Planned Capital Expenditures [Line Items]
Remainder of 2026	8,030
2027	11,700
2028	11,240
2029	13,065
2030	13,325
Total	57,360
NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	13,825
2027	13,265
2028	5,625
2029	1,635
2030	1,710
Total	36,060
New Generation Expenditures [Member] \| Florida Power & Light Company
Planned Capital Expenditures [Line Items]
Remainder of 2026	3,075
2027	4,330
2028	4,010
2029	4,820
2030	4,225
Total	20,460
Allowance for funds used during construction (AFUDC) - remainder of 2026	160
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	730
2027	1,360
2028	1,300
2029	1,300
2030	1,350
Total	6,040
Transmission And Distribution Expenditures [Member] \| Florida Power & Light Company
Planned Capital Expenditures [Line Items]
Remainder of 2026	3,320
2027	4,910
2028	4,775
2029	5,900
2030	6,720
Total	25,625
Allowance for funds used during construction (AFUDC) - remainder of 2026	65
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	155
2027	345
2028	415
2029	380
2030	410
Total	1,705
General And Other Expenditures [Member] \| Florida Power & Light Company
Planned Capital Expenditures [Line Items]
Remainder of 2026	750
2027	755
2028	740
2029	665
2030	620
Total	3,530
Wind Expenditures [Member] \| NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	1,980
2027	1,545
2028	1,520
2029	170
2030	105
Total	$ 5,320
Planned new generation over 5 year period (in megawatts) \| MW	3,717
Solar Expenditures [Member] \| NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	$ 7,380
2027	6,090
2028	1,610
2029	0
2030	25
Total	$ 15,105
Planned new generation over 5 year period (in megawatts) \| MW	13,650
Other Clean Energy \| NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	$ 2,680
2027	3,130
2028	570
2029	10
2030	0
Total	$ 6,390
Planned new generation over 5 year period (in megawatts) \| MW	4,846
Nuclear Expenditures [Member] \| NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	$ 620
2027	1,065
2028	825
2029	485
2030	445
Total	3,440
Rate-Regulated Transmission [Member] \| NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	645
2027	1,085
2028	790
2029	635
2030	765
Total	3,920
Other Expenditures [Member] \| NEER Segment
Planned Capital Expenditures [Line Items]
Remainder of 2026	520
2027	350
2028	310
2029	335
2030	370
Total	$ 1,885

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: