NEP (Summarized Financial Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Schedule of Investments [Line Items]
Operating revenues	$ 3,726	$ 4,613
Operating Income	669	1,981
Net Income	1,498	308
Net income (loss) attributable to NEE	1,666	421
NextEra Energy Partners [Member]
Schedule of Investments [Line Items]
Operating revenues	246	212
Operating Income	78	49
Net Income	571	(720)
Net income (loss) attributable to NEE	$ 202	$ (222)