Commitments and Contingencies (Details) (USD $)	6 Months Ended	24 Months Ended			3 Months Ended		6 Months Ended										6 Months Ended																			6 Months Ended				12 Months Ended						6 Months Ended				6 Months Ended
	Jun. 30, 2011	Dec. 31, 1996	Oct. 31, 2004	Jan. 29, 1999	Jun. 30, 2011 FPL [Member]	Jun. 30, 2010 FPL [Member]	Jun. 30, 2011 FPL [Member]	Jun. 30, 2010 FPL [Member]	Jun. 30, 2011 FPL [Member] New Generation Expenditures [Member]		Jun. 30, 2011 FPL [Member] Existing Generation Expenditures [Member]		Jun. 30, 2011 FPL [Member] Transmission And Distribution Expenditures [Member]	Jun. 30, 2011 FPL [Member] Nuclear Fuel Expenditures [Member]	Jun. 30, 2011 FPL [Member] General And Other Expenditures [Member]	Jun. 30, 2011 FPL [Member] Generation Expenditures [Member]	Jun. 30, 2011 FPL [Member] Jea And Southern Subsidiaries Contract Range 2 [Member] mW	Jun. 30, 2011 FPL [Member] Jea And Southern Subsidiaries Contract Range 1 [Member] mW	Jun. 30, 2011 FPL [Member] Qualifying Facilities Contracts [Member] mW	Jun. 30, 2011 FPL [Member] Other Electricity Suppliers Contract [Member] mW	Jun. 30, 2011 FPL [Member] Natural Gas, Coal, And Oil, Including Transportation And Storage [Member]	Jun. 30, 2011 FPL [Member] Qualifying Facilities Capacity Payments [Member]		Jun. 30, 2011 FPL [Member] Jea And Southern Subsidiaries Capacity Payments [Member]		Jun. 30, 2011 FPL [Member] Other Electricity Suppliers Capacity Payments [Member]		Jun. 30, 2011 FPL [Member] Natural Gas, Including Transportation And Storage, Contract Minimum Payments [Member]		Jun. 30, 2011 FPL [Member] Oil Contract Minimum Payments [Member]		Jun. 30, 2011 FPL [Member] Coal Contract Minimum Payments [Member]		Jun. 30, 2011 NextEra Energy Resources [Member]		Jun. 30, 2011 NextEra Energy Resources [Member] Wind Expenditures [Member] mW		Jun. 30, 2011 NextEra Energy Resources [Member] Solar Expenditures [Member] mW		Dec. 31, 2010 NextEra Energy Resources [Member] Solar Expenditures [Member] mW	Jun. 30, 2011 NextEra Energy Resources [Member] Nuclear Expenditures [Member]		Jun. 30, 2011 NextEra Energy Resources [Member] Natural Gas Expenditures [Member]	Jun. 30, 2011 NextEra Energy Resources [Member] Other Expenditures [Member]		Jun. 30, 2011 NextEra Energy Resources [Member] Contract Group 1 [Member]	Jun. 30, 2011 NextEra Energy Resources [Member] Contract Group 2 [Member]	Jun. 30, 2011 Corporate And Other [Member]		Jun. 30, 2011 Guarantee of certain debt service and fuel payments [Member]	Jun. 30, 2011 Seabrook Station Insurance [Member]	Jun. 30, 2011 Duane Arnold Energy Center Insurance [Member]	Jun. 30, 2011 St Lucie Unit No 2 Insurance [Member]
Planned Capital Expenditures [Line Items]
2011					$ 1,855,000,000		$ 1,855,000,000		$ 755,000,000	[1],[2],[3]	$ 410,000,000	[2]	$ 430,000,000	$ 165,000,000	$ 95,000,000																			$ 1,550,000,000		$ 340,000,000	[4]	$ 710,000,000	[5]		$ 325,000,000	[6]	$ 50,000,000	$ 125,000,000	[7]			$ 300,000,000	[8]
2012					3,685,000,000		3,685,000,000		1,750,000,000	[1],[2],[3]	785,000,000	[2]	780,000,000	170,000,000	200,000,000																			1,765,000,000		445,000,000	[4]	925,000,000	[5]		290,000,000	[6]	35,000,000	70,000,000	[7]			455,000,000	[8]
2013					2,390,000,000		2,390,000,000		515,000,000	[1],[2],[3]	720,000,000	[2]	685,000,000	255,000,000	215,000,000																			860,000,000		10,000,000	[4]	485,000,000	[5]		255,000,000	[6]	60,000,000	50,000,000	[7]			70,000,000	[8]
2014					1,690,000,000		1,690,000,000		85,000,000	[1],[2],[3]	640,000,000	[2]	640,000,000	205,000,000	120,000,000																			400,000,000		5,000,000	[4]	35,000,000	[5]		260,000,000	[6]	40,000,000	60,000,000	[7]			40,000,000	[8]
2015					1,520,000,000		1,520,000,000		0	[1],[2],[3]	550,000,000	[2]	630,000,000	220,000,000	120,000,000																			445,000,000		5,000,000	[4]	0	[5]		280,000,000	[6]	115,000,000	45,000,000	[7]			35,000,000	[8]
Total					11,140,000,000		11,140,000,000		3,105,000,000	[1],[2],[3]	3,105,000,000	[2]	3,165,000,000	1,015,000,000	750,000,000																			5,020,000,000		805,000,000	[4]	2,155,000,000	[5]		1,410,000,000	[6]	300,000,000	350,000,000	[7]			900,000,000	[8]
Allowance for funds used during construction (AFUDC) - 2011																19,000,000																																6,000,000
Allowance for funds used during construction (AFUDC) - 2012																79,000,000																																40,000,000
Allowance for funds used during construction (AFUDC) - 2013																83,000,000																																14,000,000
Allowance for funds used during construction (AFUDC) - 2014																33,000,000
Pre-construction costs and carrying charges (equal to a pretax AFUDC rate) - 2011									73,000,000
Pre-construction costs and carrying charges (equal to a pretax AFUDC rate) - 2012									98,000,000
Pre-construction costs and carrying charges (equal to a pretax AFUDC rate) - 2013									30,000,000
Pre-construction costs and carrying charges (equal to a pretax AFUDC rate) - 2014									2,000,000
Expected cost of Port Everglades power plant modernization									1,200,000,000
Planned new wind generation over current year and next year, low range (in megawatts)																																				1,400
Planned new wind generation over current year and next year, high range (in megawatts)																																				2,000
Planned new wind generation costs over current year and next year, low range																																				3,000,000,000
Planned new wind generation costs over current year and next year, high range																																				4,000,000,000
Planned new wind generation added to date in current year (in megawatts)																																				150
Planned new solar generation over 5 year period 2010 - 2014, low range (in megawatts)																																						400
Planned new solar generation over 5 year period 2010 - 2014, high range (in megawatts)																																						600
Planned new solar generation costs over 5 year period 2010 - 2014, low range																																						3,000,000,000
Planned new solar generation costs over 5 year period 2010 - 2014, high range																																						4,000,000,000
Planned new solar generation added in previous year (in megawatts)																																								5
Planned new solar generation added to date in 2011 (in megawatts)																																						5
Planned gas infrastructure costs over 5 year period 2010 - 2014, low range																																											400,000,000
Planned gas infrastructure costs over 5 year period 2010 - 2014, high range																																											600,000,000
Guarantor Obligations [Line Items]
Terms of guarantees relating to non-consolidated entities (in years)																																																		less than one year to six years
Amount of guarantees related to non-consolidated entities																																																		54,000,000
Long Term Purchase Commitment [Abstract]
Minimum annual purchase commitments (in megawatts)																	375	1,330
Time period under contracts																	through 2021	through 2015
Minimum total purchase commitments (in megawatts)																			650	155
Expiration dates of purchase commitments																			2024 through 2032	2012	through 2036																									August 2011 through 2033	2012 through 2033
Commitment amount included in capital expenditures																																														1,500,000,000
Required capacity and/or minimum payments [Abstract]
2011																						140,000,000	[9]	115,000,000	[9]	5,000,000	[9]	1,265,000,000	[10]	50,000,000	[10]	45,000,000	[10]	1,630,000,000	[11]													140,000,000
2012																						290,000,000	[9]	225,000,000	[9]	5,000,000	[9]	1,485,000,000	[10]	0	[10]	70,000,000	[10]	475,000,000	[11]													235,000,000
2013																						275,000,000	[9]	220,000,000	[9]	0	[9]	840,000,000	[10]	0	[10]	60,000,000	[10]	230,000,000	[11]													15,000,000
2014																						275,000,000	[9]	200,000,000	[9]	0	[9]	550,000,000	[10]	0	[10]	5,000,000	[10]	185,000,000	[11]													0
2015																						280,000,000	[9]	175,000,000	[9]	0	[9]	535,000,000	[10]	0	[10]	0	[10]	165,000,000	[11]													0
Thereafter																						2,630,000,000	[9]	195,000,000	[9]	0	[9]	7,345,000,000	[10]	0	[10]	0	[10]	840,000,000	[11]													0
Capacity payments					124,000,000	137,000,000	247,000,000	286,000,000
Energy payments					129,000,000	114,000,000	206,000,000	213,000,000
Insurance [Abstract]
Maximum obtainable amount of private liability insurance available under Price-Anderson Act	375,000,000
Amount of secondary financial protection liability insurance coverage per incident	12,200,000,000
Potential amount of retrospective assessment under secondary financial protection system	940,000,000
Potential amount of retrospective assessment under secondary financial protection system payable per incident per year	140,000,000
Potential retrospective assessment recoverable from minority interest for nuclear liability secondary financial protection																																																			14,000,000	35,000,000	18,000,000
Amount of coverage per occurrence per site for property damage, decontamination and premature decommissioning risks	2,750,000,000
Potential amount of retrospective assessment per occurrence per site for property damage, decontamination and premature decommissioning risks	164,000,000
Potential retrospective assessment recoverable from minority interest for property damage, decontamination and premature decommissioning risks																																																			2,000,000	4,000,000	3,000,000
Legal Proceedings [Abstract]
FPL's interest owned in generation facility Scherer Unit No. 4 (in hundredths)	76.00%
Maximum amount of civil penalties per day - Clean Air Act from June 1, 1975 through January 30, 1997	25,000
Maximum amount of civil penalties per day - Clean Air Act from January 31, 1997 through March 15, 2004	27,500
Maximum amount of civil penalties per day - Clean Air Act from March 16, 2004 through January 12, 2009	32,500
Maximum amount of civil penalties per day - Clean Air Act from January 13, 2009 forward	37,500
Shares of Adelphia common stock purchased (in shares)		1,091,524
Shares of Adelphia preferred stock purchased (in shares)		20,000
Shares of Adelphia common stock if Adelphia preferred stock converted to Adelphia common stock (in shares)		2,358,490
Aggregate price paid for Adelphia common and preferred stock		35,900,000
Cash paid by Adelphia for repurchase of Adelphia acquired shares				149,213,130
Damages asserted for breach of contract			$ 34,000,000

[1] Consists of projects that have received FPSC approval. Includes pre-construction costs and carrying charges (equal to a pretax AFUDC rate) on construction costs recoverable through the capacity clause of approximately $73 million, $98 million, $30 million and $2 million in 2011 to 2014, respectively. Excludes capital expenditures for the construction costs for the two additional nuclear units at FPL's Turkey Point site beyond what is required to receive an NRC license for each unit. Excludes capital expenditures for the modernization of the Port Everglades facility, which if the project proceeds and the required regulatory approvals are obtained is expected to cost approximately $1.2 billion and be placed in-service in 2016.

[2] Includes allowance for funds used during construction (AFUDC) of approximately $19 million, $79 million, $83 million and $33 million in 2011 to 2014, respectively.

[3] Includes land, generating structures, transmission interconnection and integration and licensing.

[4] Consists of capital expenditures for planned new wind projects that have received applicable internal approvals and related transmission. NextEra Energy Resources plans to add new wind generation of approximately 1,400 mw to 2,000 mw in 2011 and 2012, at a total cost of approximately $3 billion to $4 billion. These amounts include 150 mw added to date in 2011.

[5] Consists of capital expenditures for planned new solar projects that have received applicable internal approvals and related transmission. NextEra Energy Resources plans to add new solar generation of approximately 400 mw to 600 mw in 2010 through 2014, at a total cost of approximately $3 billion to $4 billion. These amounts include 5 mw added in 2010 and 5 mw added to date in 2011.

[6] Includes nuclear fuel.

[7] Consists of capital expenditures that have received applicable internal approvals. NextEra Energy Resources plans to add natural gas infrastructure projects at a total cost of approximately $400 million to $600 million in 2010 through 2014.

[8] Consists of capital expenditures that have received applicable internal approvals and includes AFUDC of approximately $6 million, $40 million and $14 million in 2011 to 2013, respectively.

[9] Capacity payments under these contracts, substantially all of which are recoverable through the capacity clause, totaled approximately $124 million and $137 million for the three months ended June 30, 2011 and 2010, respectively, and approximately $247 million and $286 million for the six months ended June 30, 2011 and 2010, respectively. Energy payments under these contracts, which are recoverable through the fuel clause, totaled approximately $129 million and $114 million for the three months ended June 30, 2011 and 2010, respectively, and approximately $206 million and $213 million for the six months ended June 30, 2011 and 2010, respectively.

[10] Recoverable through the fuel clause.

[11] Includes termination payments associated with wind turbine contracts for projects that have not yet received applicable internal approvals.