Equity (Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of basic and diluted earnings per share of common stock [Abstract]
Net income (loss) attributable to NEE	$ 7,310	$ 4,147	$ 3,573
Denominator:
Weighted-average number of common shares outstanding – basic	2,026,100,000	1,972,600,000	1,962,500,000
Equity units, stock options, performance share awards, forward sale agreements and restricted stock	4,700,000	6,000,000.0	9,700,000
Weighted-average number of common shares outstanding – assuming dilution	2,030,800,000	1,978,600,000	1,972,200,000
Earnings per share attributable to NEE:
Basic	$ 3.61	$ 2.10	$ 1.82
Assuming dilution	$ 3.60	$ 2.10	$ 1.81
Antidilutive securities (in shares)	39,100,000	38,100,000	30,500,000