Debt - Long-term Debt Issuances and Borrowings (Details)	6 Months Ended
Jun. 30, 2019 USD ($)
FPL [Member] \| First mortgage bonds [Member]
Debt Instrument [Line Items]
Principal Amount	$ 600,000,000
Interest Rate (as a percent)	3.99%
FPL [Member] \| Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Principal Amount	$ 1,000,000,000
Interest Rate Terms	Variable
NextEra Energy Capital Holdings, Inc. [Member] \| Debentures variable [Domain]
Debt Instrument [Line Items]
Principal Amount	$ 550,000,000
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] \| Junior Subordinated Debentures 5.65% Due 2079 [Member] \| Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Principal Amount	$ 1,188,000,000
Interest Rate (as a percent)	5.65%
NextEra Energy Capital Holdings, Inc. [Member] \| Other long-term debt - variable [Member]
Debt Instrument [Line Items]
Principal Amount	$ 500,000,000
Interest Rate Terms	Variable
NextEra Energy Capital Holdings, Inc. [Member] \| Junior Subordinated Debentures Variable Rate Due 2079 [Member] \| Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Principal Amount	$ 500,000,000
NextEra Energy Capital Holdings, Inc. [Member] \| Minimum [Member] \| Debentures [Member]
Debt Instrument [Line Items]
Interest Rate (as a percent)	2.90%
NextEra Energy Capital Holdings, Inc. [Member] \| Maximum [Member] \| Debentures [Member]
Debt Instrument [Line Items]
Interest Rate (as a percent)	3.50%

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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=6877327&loc=d3e13212-122682

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