Debt - Narrative (Details) - USD ($)	1 Months Ended
	Sep. 30, 2020	Feb. 29, 2020	Oct. 24, 2020
NEE Equity Units February 2020 [Member]
Debt Instrument [Line Items]
Amount of equity units sold		$ 2,500,000,000
Stated amount of each equity unit (in dollars per share)		$ 50
Undivided beneficial ownership interest per debenture (in hundredths)		5.00%
Principal amount of each debenture		$ 1,000
Number of shares (subject to antidilution adjustments) if purchased on final settlement date at less than or equal to low range threshold (in shares)	0.1773
Number of shares (subject to antidilution adjustments) if purchased on the final settlement date at equal to or greater than high range threshold (in shares)	0.1418
Trading period (in days) over which the market value is determined by reference to the average closing prices of the common stock		20 days
Rate of total annual distributions on equity units (in hundredths)	5.279%
Rate of payments on stock purchase contracts (in hundredths)	3.439%
Interest rate (as a percent)	1.84%
NEE Equity Units September 2020 [Member]
Debt Instrument [Line Items]
Amount of equity units sold	$ 2,000,000,000.0
Stated amount of each equity unit (in dollars per share)	$ 50
Undivided beneficial ownership interest per debenture (in hundredths)	5.00%
Principal amount of each debenture	$ 1,000
Number of shares (subject to antidilution adjustments) if purchased on final settlement date at less than or equal to low range threshold (in shares)	0.1691
Number of shares (subject to antidilution adjustments) if purchased on the final settlement date at equal to or greater than high range threshold (in shares)	0.1353
Trading period (in days) over which the market value is determined by reference to the average closing prices of the common stock	20 days
Rate of total annual distributions on equity units (in hundredths)	6.219%
Rate of payments on stock purchase contracts (in hundredths)	5.71%
Interest rate (as a percent)	0.509%
Minimum [Member] | NEE Equity Units February 2020 [Member]
Debt Instrument [Line Items]
Price per share of stock purchase contract (in dollars per share)	$ 282.04	$ 282.04
Minimum [Member] | NEE Equity Units September 2020 [Member]
Debt Instrument [Line Items]
Price per share of stock purchase contract (in dollars per share)	295.70
Maximum [Member] | NEE Equity Units February 2020 [Member]
Debt Instrument [Line Items]
Price per share of stock purchase contract (in dollars per share)	352.55	$ 352.55
Maximum [Member] | NEE Equity Units September 2020 [Member]
Debt Instrument [Line Items]
Price per share of stock purchase contract (in dollars per share)	$ 369.63
NextEra Energy Capital Holdings, Inc. [Member] | Series I Junior Subordinated Debentures due 2072 [Member] | Forecast [Member]
Debt Instrument [Line Items]
Interest rate (as a percent)			5.125%
Debt redeemed			$ 500,000,000
NextEra Energy Capital Holdings, Inc. [Member] | Series J Junior Subordinated Debentures due 2073 [Member] | Forecast [Member]
Debt Instrument [Line Items]
Interest rate (as a percent)			5.00%
Debt redeemed			$ 450,000,000
NextEra Energy Capital Holdings, Inc. [Member] | Minimum [Member] | Debentures Related To Nextera Energys Equity Units [Member]
Debt Instrument [Line Items]
Interest rate (as a percent)	0.509%
NextEra Energy Capital Holdings, Inc. [Member] | Maximum [Member] | Debentures Related To Nextera Energys Equity Units [Member]
Debt Instrument [Line Items]
Interest rate (as a percent)	1.84%