Equity (Earnings Per Share) (Details) $ / shares in Units, $ in Millions		12 Months Ended
	Sep. 14, 2020 shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Oct. 26, 2020 shares
Reconciliation of basic and diluted earnings per share of common stock [Abstract]
Net income (loss) attributable to NEE | $		$ 4,147	$ 3,573	$ 2,919
Denominator:
Weighted-average number of common shares outstanding – basic		1,972,600,000	1,962,500,000	1,959,000,000
Equity units, stock options, performance share awards, forward sale agreements and restricted stock		6,000,000.0	9,700,000	9,800,000
Weighted-average number of common shares outstanding – assuming dilution		1,978,600,000	1,972,200,000	1,968,800,000
Earnings per share attributable to NEE:
Basic | $ / shares		$ 2.10	$ 1.82	$ 1.49
Assuming dilution | $ / shares		$ 2.10	$ 1.81	$ 1.48
Antidilutive securities (in shares)		38,100,000	30,500,000	27,100,000
Stockholders' Equity Note, Stock Split, Conversion Ratio	4
Common stock, authorized (in shares)	800,000,000	3,200,000,000	3,200,000,000		3,200,000,000