Equity (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Reconciliation of basic and diluted earnings per share of common stock [Abstract]
Net income attributable to NEE - basic	$ 1,380	$ 256	$ 929	$ 1,922
Denominator:
Weighted-average number of common shares outstanding – basic	1,965.2	1,962.4	1,964.9	1,962.0
Equity units, stock options, performance share awards and restricted stock	7.7	7.9	8.3	8.6
Weighted-average number of common shares outstanding – assuming dilution	1,972.9	1,970.3	1,973.2	1,970.6
Earnings per share attributable to NEE:
Basic (in dollars per share)	$ 0.70	$ 0.13	$ 0.47	$ 0.98
Assuming dilution (in dollars per share)	$ 0.70	$ 0.13	$ 0.47	$ 0.98