Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- 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

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Equity (Earnings Per Share) (Details) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 14, 2020 shares	Oct. 23, 2020 USD ($)	Sep. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) $ / shares shares	Sep. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) $ / shares shares	Dec. 31, 2019 shares
Reconciliation of basic and diluted earnings per share of common stock [Abstract]
Net income attributable to NEE - basic \| $			$ 1,229	$ 879	$ 2,924	$ 2,794
Dilutive Securities, Effect on Basic Earnings Per Share \| $			(1)	0	0	0
Net income attributable to NEE - assuming dilution \| $			$ 1,228	$ 879	$ 2,924	$ 2,794
Denominator:
Weighted-average number of common shares outstanding - basic \| shares			489,900,000	481,900,000	489,600,000	479,700,000
Equity units, stock options, performance share awards and restricted stock \| shares			2,300,000	4,100,000	2,300,000	3,800,000
Weighted-average number of common shares outstanding - assuming dilution \| shares			492,200,000	486,000,000.0	491,900,000	483,500,000
Earnings per share attributable to NEE:
Basic (in dollars per share) \| $ / shares			$ 2.51	$ 1.82	$ 5.97	$ 5.82
Assuming dilution (in dollars per share) \| $ / shares			$ 2.50	$ 1.81	$ 5.94	$ 5.78
Class of Stock [Line Items]
Antidilutive securities (in shares) \| shares			11,500,000	2,200,000	9,000,000.0	1,000,000.0
Stock split, conversion ratio	4
Common stock, shares authorized (in shares) \| shares	3,200,000,000		800,000,000		800,000,000		800,000,000
Pro forma earnings per share (USD pre share) \| $ / shares			$ 0.62	$ 0.45	$ 1.49	$ 1.44
NextEra Energy Partners [Member] \| Series A Convertible Preferred Units [Member]
Class of Stock [Line Items]
Amount of shares converted \| $			$ 71	$ 183
NextEra Energy Partners [Member] \| Series A Convertible Preferred Units [Member] \| Subsequent Event [Member]
Class of Stock [Line Items]
Amount of shares converted \| $		$ 46