NEP (Summarized Financial Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Schedule of Investments [Line Items]
Operating revenues	$ 4,613	$ 4,075
Operating Income	1,981	1,135
Net Income	308	606
Net income (loss) attributable to NEE	421	680
NextEra Energy Partners [Member]
Schedule of Investments [Line Items]
Operating revenues	212	177
Operating Income	49	34
Net Income	(720)	(121)
Net income (loss) attributable to NEE	$ (222)	$ (22)