Equity (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Reconciliation of basic and diluted earnings per share of common stock [Abstract]
Net income attributable to NEE - basic	$ 2,438	$ 1,852	$ 5,300	$ 5,743
Denominator:
Weighted-average number of common shares outstanding – basic	2,064.6	2,053.5	2,059.0	2,052.5
Equity units, stock options, performance share awards, restricted stock and exchangeable notes	6.0	7.9	5.3	5.8
Weighted-average number of common shares outstanding – assuming dilution	2,070.6	2,061.4	2,064.3	2,058.3
Earnings per share attributable to NEE:
Basic (in dollars per share)	$ 1.18	$ 0.90	$ 2.57	$ 2.80
Assuming dilution (in dollars per share)	$ 1.18	$ 0.90	$ 2.57	$ 2.79