Equity (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Reconciliation of basic and diluted earnings per share of common stock [Abstract]
Net income attributable to NEE - basic	$ (451)	$ 1,666
Denominator:
Weighted-average number of common shares outstanding – basic	1,964.7	1,961.6
Equity units, stock options, performance share awards and restricted stock	8.9	11.4
Weighted-average number of common shares outstanding – assuming dilution	1,973.6	1,973.0
Earnings (loss) per share attributable to NEE:
Basic (in dollars per share)	$ (0.23)	$ 0.85
Assuming dilution (in dollars per share)	$ (0.23)	$ 0.84