CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 3,388	$ 5,776	$ 5,323
Reclassification of unrealized losses on cash flow hedges from accumulated other comprehensive income (loss) to net income	29	26	32
Net unrealized gains (losses) on securities still held	20	(12)	127
Reclassification from accumulated other comprehensive income (loss) to net income	(2)	1	(36)
Defined benefit pension and other benefits plans:
Net unrealized gain (loss) and unrecognized prior service benefit (cost)	(46)	(14)	46
Reclassification from accumulated other comprehensive income (loss) to net income	(3)	(3)	(2)
Net unrealized gains (losses) on foreign currency translation	22	(31)	23
Other comprehensive income related to equity method investee	1	4	2
Total other comprehensive income (loss), net of tax	21	(29)	192
AOCI Impact of NEP Deconsolidation	0	58	0
COMPREHENSIVE INCOME	3,409	5,805	5,515
COMPREHENSIVE LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	380	862	46
COMPREHENSIVE INCOME ATTRIBUTABLE TO NEE	$ 3,789	$ 6,667	$ 5,561