Fair Value Measurements (Details) (USD $) In Millions	3 Months Ended		6 Months Ended																		3 Months Ended	6 Months Ended	3 Months Ended				6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Fair value measurements made on a recurring basis [Member]		Dec. 31, 2010 Fair value measurements made on a recurring basis [Member]		Jun. 30, 2011 Fair value measurements made on a recurring basis [Member] Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member]	Dec. 31, 2010 Fair value measurements made on a recurring basis [Member] Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member]	Jun. 30, 2011 Fair value measurements made on a recurring basis [Member] Significant Other Observable Inputs (Level 2) [Member]		Dec. 31, 2010 Fair value measurements made on a recurring basis [Member] Significant Other Observable Inputs (Level 2) [Member]		Jun. 30, 2011 Fair value measurements made on a recurring basis [Member] Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2010 Fair value measurements made on a recurring basis [Member] Significant Unobservable Inputs (Level 3) [Member]	Jun. 30, 2011 Fair value measurements made on a recurring basis [Member] Netting [Member]		Dec. 31, 2010 Fair value measurements made on a recurring basis [Member] Netting [Member]		Jun. 30, 2011 Fair value measurements made on a non-recurring basis [Member]	Jun. 30, 2011 Fair value measurements made on a non-recurring basis [Member]	Jun. 30, 2011 Derivative Financial Instruments, Net [Member]		Jun. 30, 2010 Derivative Financial Instruments, Net [Member]		Jun. 30, 2011 Derivative Financial Instruments, Net [Member]		Jun. 30, 2010 Derivative Financial Instruments, Net [Member]
Cash equivalents:
Equity securities					$ 76		$ 122		$ 0	$ 0	$ 76		$ 122		$ 0	$ 0	$ 0	[1]	$ 0	[1]
Special use funds:
Equity securities					2,045		1,986		769	741	1,276	[2]	1,245	[3]	0	0	0	[1]	0	[1]
U.S. Government and municipal bonds					623		622		517	495	106		127		0	0	0	[1]	0	[1]
Corporate debt securities					463		486		0	0	463		486		0	0	0	[1]	0	[1]
Mortgage-backed securities					529		447		0	0	529		447		0	0	0	[1]	0	[1]
Other debt securities					121		108		0	0	121		108		0	0	0	[1]	0	[1]
Other investments:
Equity securities					5		4		3	3	2		1		0	0	0	[1]	0	[1]
U.S. Government and municipal bonds					13		12		13	8	0		4		0	0	0	[1]	0	[1]
Corporate debt securities					52		32		0	0	52		32		0	0	0	[1]	0	[1]
Mortgage-backed securities					36		58		0	0	36		58		0	0	0	[1]	0	[1]
Other					23		15		5	5	18		10		0	0	0	[1]	0	[1]
Derivatives:
Commodity contracts					723	[4]	940	[4]	1,432	1,755	1,433		1,538		707	824	(2,849)	[1]	(3,177)	[1]
Interest rate swaps					65	[4]	107	[4]	0	0	65		107		0	0	0	[1]	0	[1]
Foreign currency swaps					7	[4]	48	[4]	0	0	7		48		0	0	0	[1]	0	[1]
Derivatives:
Commodity contracts					460	[4]	652	[4]	1,475	1,821	1,294		1,509		552	528	(2,861)	[1]	(3,206)	[1]
Interest rate swaps					157	[4]	123	[4]	0	0	157		123		0	0	0	[1]	0	[1]
Foreign currency swaps					7	[4]	4	[4]	0	0	7		4		0	0	0	[1]	0	[1]
Fair value of investments in commingled funds whose underlying investments would be Level 1 if those investments were held directly by the registrant					1,147		1,084
Carrying value of property, plant, and equipment prior to impairment charge																					79	79
Property, plant, and equipment, fair value disclosure																					28	28
Impairment charge	51	0	51	0																	51	51
Impairment charge, after-tax																					31	31
Reconciliation of changes in the fair value of derivatives measured based on significant unobservable inputs [Roll Forward]
Fair value of net derivatives based on significant unobservable inputs, beginning balance																							104		549		296		364
Realized and unrealized gains (losses):
Included in earnings																							95	[5]	(110)	[6]	13	[5]	350	[6]
Included in regulatory assets and liabilities																							2		(1)		2		(1)
Purchases																							53				141
Settlements																							(58)				(103)
Issuances																							(38)				(190)
Purchases, sales, settlements and issuances																									(69)				(338)
Transfers in																							1	[7]	1	[8]	2	[7]	2	[8]
Transfers out																							(4)	[7]	(23)	[8]	(6)	[7]	(30)	[8]
Fair value of net derivatives based on significant unobservable inputs, ending balance																							155		347		155		347
The amount of gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to derivatives still held at the reporting date																							89	[9]	(99)	[10]	8	[9]	237	[10]
Realized and unrealized gains (losses) reflected in operating revenues	92	(109)	0	343
Realized and unrealized gains (losses) reflected in fuel purchased power and interchange	3	(1)	13	7
Unrealized gains (losses) reflected in operating revenues	89	(98)	3	233
Unrealized gains (losses) reflected in fuel purchased power and interchange	$ 0	$ (1)	$ 5	$ 4

[1] Includes the effect of the contractual ability to settle contracts under master netting arrangements and margin cash collateral payments and receipts.

[2] At NextEra Energy, approximately $1,147 million ($1,036 million at FPL) are invested in commingled funds whose underlying investments would be Level 1 if those investments were held directly by NextEra Energy or FPL.

[3] At NextEra Energy, approximately $1,084 million ($980 million at FPL) are invested in commingled funds whose underlying investments would be Level 1 if those investments were held directly by NextEra Energy or FPL.

[4] See Note 2 for a reconciliation of net derivatives to NextEra Energy's and FPL's condensed consolidated balance sheets.

[5] For the three and six months ended June 30, 2011, $92 million and less than $1 million, respectively, of realized and unrealized gains (losses) are reflected in operating revenues in the condensed consolidated statements of income. For the three and six months ended June 30, 2011, $3 million and $13 million, respectively, of realized and unrealized gains (losses) are reflected in fuel, purchased power and interchange in the condensed consolidated statements of income.

[6] For the three and six months ended June 30, 2010, $(109) million and $343 million, respectively, of realized and unrealized gains (losses) are reflected in operating revenues in the condensed consolidated statements of income. For the three and six months ended June 30, 2010, $(1) million and $7 million, respectively, of realized and unrealized gains (losses) are reflected in fuel, purchased power and interchange in the condensed consolidated statements of income.

[7] For the three and six months ended June 30, 2011, transfers into Level 3 were a result of decreased observability of market data and transfers from Level 3 to Level 2 were a result of increased observability of market data. NextEra Energy's and FPL's policy is to recognize all transfers at the beginning of the reporting period.

[8] For the three and six months ended June 30, 2010, transfers into Level 3 were a result of decreased observability of market data and transfers from Level 3 to Level 2 were a result of increased observability of market data. NextEra Energy's and FPL's policy is to recognize all transfers at the beginning of the reporting period.

[9] For the three and six months ended June 30, 2011, $89 million and $3 million, respectively, of unrealized gains (losses) are reflected in operating revenues in the condensed consolidated statements of income. For the three and six months ended June 30, 2011, less than $1 million and $5 million, respectively, of unrealized gains (losses) are reflected in fuel, purchased power and interchange in the condensed consolidated statements of income.

[10] For the three and six months ended June 30, 2010, $(98) million and $233 million, respectively, of unrealized gains (losses) are reflected in operating revenues in the condensed consolidated statements of income. For the three and six months ended June 30, 2010, $(1) million and $4 million, respectively, of unrealized gains (losses) are reflected in fuel, purchased power and interchange in the condensed consolidated statements of income.