Equity (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reconciliation of basic and diluted earnings per share of common stock [Abstract]
Net income attributable to NEE - basic	$ 2,086	$ (451)
Denominator:
Weighted-average number of common shares outstanding – basic	1,999.9	1,964.7
Equity units, stock options, performance share awards and restricted stock	5.2	8.9
Weighted-average number of common shares outstanding – assuming dilution	2,005.1	1,973.6
Earnings (loss) per share attributable to NEE:
Basic (in dollars per share)	$ 1.04	$ (0.23)
Assuming dilution (in dollars per share)	$ 1.04	$ (0.23)