CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Millions, $ in Millions		Total		Common Stock [Member]	Additional Paid-in Capital [Member]		Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]		Total Common Shareholders' Equity Parent [Member]		Noncontrolling Interest [Member]		FPL [Member]	FPL [Member] Common Stock [Member]	FPL [Member] Additional Paid-in Capital [Member]	FPL [Member] Retained Earnings [Member]
Beginning Balance (in shares) at Dec. 31, 2017				471
Beginning Balance at Dec. 31, 2017		$ 29,531	[1]	$ 5	$ 9,100	[1]	$ 111	$ 19,020	[1]	$ 28,236	[1]	$ 1,295	[1]	$ 17,040	$ 1,373	$ 8,291	$ 7,376
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)								4,431	[1]	4,431	[1]	(597)	[1]				484
Share-based payment activity	[1]				5					5
Dividends on common stock	[1],[2]							(523)		(523)
Other comprehensive income (loss)		(19)					(19)			(19)	[1]
Impact of NEP deconsolidation	[3]						58			58	[1]	(2,700)	[1]
Other differential membership interests activity	[1]											(14)
Capital contributions from NEE																850
Other					1	[1]		(1)	[1]								(7)
Ending Balance (in shares) at Mar. 31, 2018				471
Ending Balance at Mar. 31, 2018		$ 36,017	[1]	$ 5	9,696	[1]	(178)	23,207	[1]	32,730	[1]	3,287	[1]	18,367	1,373	9,141	7,853
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends per share of common stock (in dollars per share)		$ 1.11
Beginning Balance (in shares) at Dec. 31, 2017				471
Beginning Balance at Dec. 31, 2017		$ 29,531	[1]	$ 5	9,100	[1]	111	19,020	[1]	28,236	[1]	1,295	[1]	17,040	1,373	8,291	7,376
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)	[4],[5]	5,462
Other comprehensive income (loss)	[4]	2
Ending Balance (in shares) at Sep. 30, 2018				478
Ending Balance at Sep. 30, 2018		37,346	[1]	$ 5	10,466	[1]	(157)	23,946	[1]	34,260	[1]	3,086	[1]	21,109	1,373	10,603	9,133
Beginning Balance (in shares) at Mar. 31, 2018				471
Beginning Balance at Mar. 31, 2018		36,017	[1]	$ 5	9,696	[1]	(178)	23,207	[1]	32,730	[1]	3,287	[1]	18,367	1,373	9,141	7,853
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)								781	[1]	781	[1]	(94)	[1]				626
Share-based payment activity (in shares)				1
Share-based payment activity	[1]				38					38
Dividends on common stock	[1],[2]							(524)		(524)
Other comprehensive income (loss)		5					5			5	[1]
Other differential membership interests activity	[1]											(46)
Other	[1]							1		1		4
Ending Balance (in shares) at Jun. 30, 2018				472
Ending Balance at Jun. 30, 2018		$ 36,182	[1]	$ 5	9,734	[1]	(173)	23,465	[1]	33,031	[1]	3,151	[1]	18,993	1,373	9,141	8,479
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends per share of common stock (in dollars per share)		$ 1.11
Net Income (loss)		$ 941	[4],[6]					1,005	[1]	1,005	[1]	(64)	[1]				654
Stock Issued During Period, Shares, New Issues				6
Stock Issued During Period, Value, New Issues	[1]				700					700
Share-based payment activity (in shares)				0
Share-based payment activity	[1]				39					39
Dividends on common stock	[1],[2]							(523)		(523)
Other comprehensive income (loss)		16	[4]				16			16	[1]
Other differential membership interests activity	[1]				(5)					(5)		(7)
Capital contributions from NEE																936
NEE's contribution of a consolidated subsidiary																526
Other	[1]				(2)			(1)		(3)		6
Ending Balance (in shares) at Sep. 30, 2018				478
Ending Balance at Sep. 30, 2018		$ 37,346	[1]	$ 5	10,466	[1]	(157)	23,946	[1]	34,260	[1]	3,086	[1]	21,109	1,373	10,603	9,133
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends per share of common stock (in dollars per share)		$ 1.11
Beginning Balance (in shares) at Dec. 31, 2018		478		478
Beginning Balance at Dec. 31, 2018		$ 37,413		$ 5	10,490		(188)	23,837		34,144		3,269		21,014	1,373	10,601	9,040
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)								680		680		(74)					588
Share-based payment activity (in shares)				1
Share-based payment activity					30					30
Dividends on common stock	[7]							(598)		(598)
Other comprehensive income (loss)		(24)					(24)			(24)
Other differential membership interests activity												389
Capital contributions from NEE																250
Other					(5)		(1)			(6)		30				1
Ending Balance (in shares) at Mar. 31, 2019				479
Ending Balance at Mar. 31, 2019		$ 37,840		$ 5	10,515		(213)	23,919		34,226		3,614		21,853	1,373	10,852	9,628
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends per share of common stock (in dollars per share)		$ 1.25
Beginning Balance (in shares) at Dec. 31, 2018		478		478
Beginning Balance at Dec. 31, 2018		$ 37,413		$ 5	10,490		(188)	23,837		34,144		3,269		21,014	1,373	10,601	9,040
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)		2,544
Other comprehensive income (loss)		$ 8
Ending Balance (in shares) at Sep. 30, 2019		489		489
Ending Balance at Sep. 30, 2019		$ 40,174		$ 5	11,933		(181)	24,835		36,592		3,582		20,998	1,373	10,852	8,773
Beginning Balance (in shares) at Mar. 31, 2019				479
Beginning Balance at Mar. 31, 2019		37,840		$ 5	10,515		(213)	23,919		34,226		3,614		21,853	1,373	10,852	9,628
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (loss)								1,234		1,234		(95)					663
Share-based payment activity					47					47
Dividends on common stock								(599)	[7]	(599)	[7]						(1,400)
Other comprehensive income (loss)		22					22			22
Other differential membership interests activity												(146)
Other					(20)					(20)		143				(1)
Ending Balance (in shares) at Jun. 30, 2019				479
Ending Balance at Jun. 30, 2019		$ 38,426		$ 5	10,542		(191)	24,554		34,910		3,516		21,115	1,373	10,851	8,891
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends per share of common stock (in dollars per share)		$ 1.25
Net Income (loss)		$ 798						879		879		(81)					683
Stock Issued During Period, Shares, New Issues				10
Stock Issued During Period, Value, New Issues					1,470					1,470
Share-based payment activity					39					39
Dividends on common stock								(600)	[7]	(600)	[7]						(800)
Other comprehensive income (loss)		$ 10					10			10
Premium On Publicly Traded Equity Units Known As Corporate Units					(120)					(120)
Other differential membership interests activity												133
Other					2			2		4		14				1	(1)
Ending Balance (in shares) at Sep. 30, 2019		489		489
Ending Balance at Sep. 30, 2019		$ 40,174		$ 5	$ 11,933		$ (181)	$ 24,835		$ 36,592		$ 3,582		$ 20,998	$ 1,373	$ 10,852	$ 8,773
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends per share of common stock (in dollars per share)		$ 1.25

[1] Amounts have been retrospectively adjusted for an accounting standards update related to leases.

[2] Dividends per share were $1.11, $1.11 and $1.11 for the three months ended September 30, 2018, June 30, 2018 and March 31, 2018, respectively.

[3] See Note 2.

[4] Amounts have been retrospectively adjusted for an accounting standards update related to leases.

[5] Amounts have been retrospectively adjusted for an accounting standards update related to leases.

[6] Amounts have been retrospectively adjusted for an accounting standards update related to leases.

[7] Dividends per share were $1.25, $1.25 and $1.25 for the three months ended September 30, 2019, June 30, 2019 and March 31, 2019, respectively.