Debt - Long-term Debt Issuances and Borrowings (Details)	9 Months Ended
Sep. 30, 2021 USD ($)
Senior Secured Limited Resource Notes Maturing in 2038 \| NEER Segment \| Florida Pipeline Holdings LLC
Debt Instrument [Line Items]
Security interest (as a percent)	100.00%
Senior Secured Limited Resource Notes Maturing in 2038 \| NEER Segment \| Florida Southeast Connection
Debt Instrument [Line Items]
Security interest (as a percent)	100.00%
Senior Secured Limited Resource Notes Maturing in 2038 \| NEER Segment \| Sabal Trail Transmission
Debt Instrument [Line Items]
Security interest (as a percent)	42.50%
Senior Secured Limited Resource Notes Maturing in 2028 \| NEER Segment \| Florida Pipeline Funding LLC
Debt Instrument [Line Items]
Security interest (as a percent)	100.00%
FPL [Member] \| Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Principal Amount	$ 1,327,000,000
Interest Rate Terms	Variable
Principal amount not required to be held to final maturity	$ 327,000,000
NextEra Energy Capital Holdings, Inc. [Member] \| Debentures variable [Member]
Debt Instrument [Line Items]
Principal Amount	$ 2,150,000,000
Interest Rate Terms	Variable
NextEra Energy Capital Holdings, Inc. [Member] \| Debentures [Member]
Debt Instrument [Line Items]
Principal Amount	$ 3,500,000,000
NextEra Energy Capital Holdings, Inc. [Member] \| Debentures [Member] \| Minimum
Debt Instrument [Line Items]
Interest Rate (as a percent)	0.65%
NextEra Energy Capital Holdings, Inc. [Member] \| Debentures [Member] \| Maximum
Debt Instrument [Line Items]
Interest Rate (as a percent)	1.90%
NextEra Energy Capital Holdings, Inc. [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Principal Amount	$ 645,000,000
Interest Rate Terms	Variable
NEER Segment \| Senior Secured Limited Recourse Notes
Debt Instrument [Line Items]
Principal Amount	$ 1,773,000,000
NEER Segment \| Senior Secured Limited Recourse Notes \| Minimum
Debt Instrument [Line Items]
Interest Rate (as a percent)	2.92%
NEER Segment \| Senior Secured Limited Recourse Notes \| Maximum
Debt Instrument [Line Items]
Interest Rate (as a percent)	4.70%
Florida Pipeline Holdings LLC \| Senior Secured Limited Resource Notes Maturing in 2038 \| NEER Segment
Debt Instrument [Line Items]
Principal Amount	$ 1,513,000,000
Interest Rate (as a percent)	2.92%
Florida Pipeline Funding LLC \| Senior Secured Limited Resource Notes Maturing in 2028 \| NEER Segment
Debt Instrument [Line Items]
Principal Amount	$ 260,000,000
Interest Rate (as a percent)	4.70%

Debt Covenant, Secured Interest in Ownership Percentage

No definition available.

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Balance Type:	na
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- Definition

Debt Instrument, Face Amount, Not Required To Be Held To Final Maturity

+ References

No definition available.

+ Details

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Namespace Prefix:	nee_
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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (a)
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+ Details

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Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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- Definition

Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- 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

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