Debt (Details)	9 Months Ended
Sep. 30, 2016 USD ($)
FPL [Member] \| Other Long Term Debt, Variable [Member]
Debt Instrument [Line Items]
Principal Amount	$ 150,000,000
Interest Rate Terms	Variable
NEECH [Member] \| Debentures, Fixed [Member]
Debt Instrument [Line Items]
Principal Amount	$ 500,000,000
Interest Rate	2.30%
NEECH [Member] \| Debentures, Related to NEE's Equity Units - Fixed [Member]
Debt Instrument [Line Items]
Principal Amount	$ 1,500,000,000
NEECH [Member] \| Debentures, Related to NEE's Equity Units [Member]
Debt Instrument [Line Items]
Interest Rate	1.65%
NEECH [Member] \| Junior Subordinated Debentures, Fixed [Member]
Debt Instrument [Line Items]
Principal Amount	$ 570,000,000
Interest Rate	5.25%
NEECH [Member] \| Other Long Term Debt, Fixed [Member]
Debt Instrument [Line Items]
Principal Amount	$ 100,000,000
Interest Rate	1.00%
NEER [Member] \| Senior Secured Limited Recourse Term Loans, Variable [Member]
Debt Instrument [Line Items]
Principal Amount	$ 837,000,000
Interest Rate Terms	Variable
NEER [Member] \| Other Long Term Debt, Variable [Member]
Debt Instrument [Line Items]
Principal Amount	$ 925,000,000
Interest Rate Terms	Variable

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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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+ References

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- Definition

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+ References

No definition available.

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