Debt (Narrative) (Details) - USD ($)		1 Months Ended	3 Months Ended
	Jun. 01, 2015	Sep. 30, 2015	Sep. 30, 2015	Oct. 31, 2015	Aug. 31, 2015	May. 31, 2015
FPL [Member]
Debt Instrument [Line Items]
Purchase and cancellation of first mortgage bonds		$ 400,000,000
Term Loan [Member] | NextEra Energy Partners subsidiary [Member] | Variable Rate Senior Secured Term Loans Maturing 2018 [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Face amount				$ 600,000,000
NEE Equity Units 2012 [Member]
Debt Instrument [Line Items]
Debentures remarketed					$ 650,000,000	$ 600,000,000
Rate of Interest on debentures after remarketing					2.056%	1.586%
Issuance of common stock	7,860,000		8,173,099
Value of issuance of common stock	$ 600,000,000		$ 650,000,000
NEE Equity Units 2015 [Member]
Debt Instrument [Line Items]
Amount of equity units sold		$ 700,000,000	$ 700,000,000
Stated amount of each equity unit (in dollars per share)		$ 50	$ 50
Undivided beneficial ownership interest per debenture (in hundredths)		5.00%	5.00%
Principal amount of each debenture		$ 1,000	$ 1,000
Price per share on stock purchase contract - low range (in dollars per share)		$ 95.35	$ 95.35
Price per share on stock purchase contract - high range (in dollars per share)		$ 114.42	$ 114.42
Number of shares (subject to antidilution adjustments) if purchased on the final settlement date at equal to or less than low range threshold (in shares)		0.5244	0.5244
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)		0.4370	0.4370
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)		6.371%	6.371%
Interest rate		2.36%	2.36%
Rate of payments on stock purchase contracts (in hundredths)		4.011%	4.011%
Minimum [Member] | FPL [Member] | First mortgage bonds [Member]
Debt Instrument [Line Items]
Interest rate		5.40%	5.40%
Maximum [Member] | FPL [Member] | First mortgage bonds [Member]
Debt Instrument [Line Items]
Interest rate		6.20%	6.20%