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Debt - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2018	Aug. 31, 2018
September 2015 Equity Units [Member]
Debt Instrument [Line Items]
Shares of common stock issued	6,215,998
Exchange received on issuance of common stock	$ 700
NextEra Energy Capital Holdings, Inc. [Member] | Series H Debentures Due September 1, 2020 [Member] | Debentures [Member]
Debt Instrument [Line Items]
Remarketed principal amount		$ 700
Interest Rate (as a percent)		3.342%

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- Definition

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
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Contractual interest rate for funds borrowed, under the debt agreement.

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