Equity (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Reconciliation of basic and diluted earnings per share of common stock [Abstract]
Net income attributable to NEE - basic	$ 1,696	$ 447	$ 2,625	$ 2,369
Denominator:
Weighted-average number of common shares outstanding – basic	1,972.5	1,962.7	1,967.5	1,962.2
Equity units, stock options, performance share awards and restricted stock	6.4	10.2	6.1	9.1
Weighted-average number of common shares outstanding – assuming dilution	1,978.9	1,972.9	1,973.6	1,971.3
Earnings per share attributable to NEE:
Basic (in dollars per share)	$ 0.86	$ 0.23	$ 1.33	$ 1.21
Assuming dilution (in dollars per share)	$ 0.86	$ 0.23	$ 1.33	$ 1.20