Equity (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Reconciliation of basic and diluted earnings per share of common stock [Abstract]
Net income attributable to NEE - basic	$ 2,795	$ 1,380	$ 4,881	$ 929
Denominator:
Weighted-average number of common shares outstanding – basic	2,022.0	1,965.2	2,011.0	1,964.9
Equity units, stock options, performance share awards and restricted stock	5.2	7.7	5.2	8.3
Weighted-average number of common shares outstanding – assuming dilution	2,027.2	1,972.9	2,016.2	1,973.2
Earnings per share attributable to NEE:
Basic (in dollars per share)	$ 1.38	$ 0.70	$ 2.43	$ 0.47
Assuming dilution (in dollars per share)	$ 1.38	$ 0.70	$ 2.42	$ 0.47