Equity (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Reconciliation of basic and diluted earnings per share of common stock [Abstract]
Net income attributable to NEE - basic	$ 1,219	$ 1,696	$ 6,100	$ 2,625
Denominator:
Weighted-average number of common shares outstanding – basic	2,031.3	1,972.5	2,017.8	1,967.5
Equity units, stock options, performance share awards and restricted stock	4.9	6.4	5.2	6.1
Weighted-average number of common shares outstanding – assuming dilution	2,036.2	1,978.9	2,023.0	1,973.6
Earnings per share attributable to NEE:
Basic (in dollars per share)	$ 0.60	$ 0.86	$ 3.02	$ 1.33
Assuming dilution (in dollars per share)	$ 0.60	$ 0.86	$ 3.02	$ 1.33