CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY - USD ($) $ in Millions		Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total common Shareholders' Equity [Member]	Noncontrolling Interest [Member]	FPL[Member]		FPL[Member] Common Stock [Member]	FPL[Member] Additional Paid-in Capital [Member]	FPL[Member] Retained Earnings [Member]
Balances (in shares) at Dec. 31, 2014			443,000,000
Beginning Balance at Dec. 31, 2014		$ 20,168	$ 4	$ 7,179	$ (40)	$ 12,773	$ 19,916	$ 252
BEGINNING BALANCE at Dec. 31, 2014									$ 13,151		$ 1,373	$ 6,279	$ 5,499
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		2,762				2,752	2,752	10
NET INCOME		2,752							1,648	[1]			1,648
Issuances of common stock, net of issuance cost of less than $1			$ 1	1,306			1,307
Issuances of common stock, net of issuance cost (in shares)			17,000,000
Share-based payment activity				119			119
Exercise of stock options and other incentive plan activity (in shares)			1,000,000
Dividends on common stock	[2]					(1,385)	(1,385)
Other comprehensive income (loss)		(138)			(127)		(127)	(11)
Premium on equity units				(80)			(80)
Sale of NEER Assets to NEP				88			88	252
Capital contributions from NEE									1,454			1,454
Payments of Dividends		1,385							700				(700)
Other (in shares)			0
Other				(16)			(16)	35
ENDING BALANCE at Dec. 31, 2015									15,553		1,373	7,733	6,447
Ending Balance at Dec. 31, 2015		23,112	$ 5	8,596	(167)	14,140	22,574	538
Balance (in shares) at Dec. 31, 2015			461,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		3,005				2,912	2,912	93
NET INCOME		2,912							1,727	[1]			1,727
Issuances of common stock, net of issuance cost of less than $1			$ 0	527			527
Issuances of common stock, net of issuance cost (in shares)			6,000,000
Share-based payment activity				135			135
Exercise of stock options and other incentive plan activity (in shares)			1,000,000
Dividends on common stock	[2]					(1,612)	(1,612)
Other comprehensive income (loss)		97			97		97	0
Premium on equity units				(200)			(200)
Sale of NEER Assets to NEP				0			0	433
Capital contributions from NEE									600			600
Payments of Dividends		1,612							1,300				(1,300)
Other (in shares)			0
Other				(110)		18	(92)	(74)				(1)	1
ENDING BALANCE at Dec. 31, 2016		24,341							16,580		1,373	8,332	6,875
Ending Balance at Dec. 31, 2016		$ 25,331	$ 5	8,948	(70)	15,458	24,341	990	$ 16,580
Balance (in shares) at Dec. 31, 2016		468,000,000	468,000,000						1,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		$ 5,320				5,378	5,378	(58)
NET INCOME		5,378							$ 1,880	[1]			1,880
Issuances of common stock, net of issuance cost of less than $1				33			33
Issuances of common stock, net of issuance cost (in shares)			2,000,000
Share-based payment activity				122			122
Exercise of stock options and other incentive plan activity (in shares)			1,000,000
Dividends on common stock	[2]					(1,845)	(1,845)
Other comprehensive income (loss)		193			181		181	12
Sale of NEER Assets to NEP				0				460
Capital contributions from NEE									0
Payments of Dividends		1,845							1,450				(1,450)
Other (in shares)			0
Other				(3)		1	(2)	(114)				(41)	71
ENDING BALANCE at Dec. 31, 2017		28,208							17,040		$ 1,373	$ 8,291	$ 7,376
Ending Balance at Dec. 31, 2017		$ 29,498	$ 5	$ 9,100	$ 111	$ 18,992	$ 28,208	$ 1,290	$ 17,040
Balance (in shares) at Dec. 31, 2017		471,000,000	471,000,000						1,000

[1] FPL's comprehensive income is the same as reported net income

[2] Dividends per share were $3.93, $3.48 and $3.08 for the years ended December 31, 2017, 2016 and 2015, respectively.