Commitments and Contingencies (Required Capacity and/or Minimum Payments Under Contracts) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2009
FPL [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments	$ 511,000,000		$ 537,000,000	$ 603,000,000
Energy payments	403,000,000		434,000,000	439,000,000
FPL [Member] | Jea and Southern Subsidiaries Contract Range 1 [Member]
Long-term Purchase Commitment [Line Items]
Minimum annual purchase commitments (in megawatts)	1,330
Time period under contracts	through 2015
FPL [Member] | Jea and Southern Subsidiaries Contract Range 2 [Member]
Long-term Purchase Commitment [Line Items]
Minimum annual purchase commitments (in megawatts)	375
Time period under contracts	through 2021
FPL [Member] | Qualifying Facilities Contracts [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2012	295,000,000	[1]
Capacity payments and/or minimum payments - 2013	270,000,000	[1]
Capacity payments and/or minimum payments - 2014	275,000,000	[1]
Capacity payments and/or minimum payments - 2015	280,000,000	[1]
Capacity payments and/or minimum payments - 2016	240,000,000	[1]
Capacity payments and/or minimum payments - Thereafter	2,395,000,000	[1]
FPL [Member] | Qualifying Facilities Contracts [Member] | Minimum [Member]
Long-term Purchase Commitment [Line Items]
Time period under contracts	2024
FPL [Member] | Qualifying Facilities Contracts [Member] | Maximum [Member]
Long-term Purchase Commitment [Line Items]
Time period under contracts	2034
FPL [Member] | Other Electricity Suppliers Contract [Member]
Long-term Purchase Commitment [Line Items]
Minimum annual purchase commitments (in megawatts)	155
Time period under contracts	May 2012
FPL [Member] | Natural Gas, Coal, and Oil, Including Transportation and Storage [Member]
Long-term Purchase Commitment [Line Items]
Time period under contracts	through 2036
FPL [Member] | Qualifying Facilities Contracts [Member]
Long-term Purchase Commitment [Line Items]
Minimum annual purchase commitments (in megawatts)	705
FPL [Member] | JEA and Southern Subsidiaries Capacity Payments [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2012	225,000,000	[1]
Capacity payments and/or minimum payments - 2013	225,000,000	[1]
Capacity payments and/or minimum payments - 2014	205,000,000	[1]
Capacity payments and/or minimum payments - 2015	180,000,000	[1]
Capacity payments and/or minimum payments - 2016	55,000,000	[1]
Capacity payments and/or minimum payments - Thereafter	145,000,000	[1]
FPL [Member] | Other Electricity Suppliers Capacity Payments [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2012	5,000,000	[1]
Capacity payments and/or minimum payments - 2013	0	[1]
Capacity payments and/or minimum payments - 2014	0	[1]
Capacity payments and/or minimum payments - 2015	0	[1]
Capacity payments and/or minimum payments - 2016	0	[1]
Capacity payments and/or minimum payments - Thereafter	0	[1]
FPL [Member] | Natural Gas Including Transportation and Storage Contract Minimum Payments [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2012	1,705,000,000	[2]
Capacity payments and/or minimum payments - 2013	925,000,000	[2]
Capacity payments and/or minimum payments - 2014	575,000,000	[2]
Capacity payments and/or minimum payments - 2015	565,000,000	[2]
Capacity payments and/or minimum payments - 2016	525,000,000	[2]
Capacity payments and/or minimum payments - Thereafter	6,925,000,000	[2]
FPL [Member] | Coal Contract Minimum Payments [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2012	80,000,000	[2]
Capacity payments and/or minimum payments - 2013	85,000,000	[2]
Capacity payments and/or minimum payments - 2014	30,000,000	[2]
Capacity payments and/or minimum payments - 2015	5,000,000	[2]
Capacity payments and/or minimum payments - 2016	5,000,000	[2]
Capacity payments and/or minimum payments - Thereafter	5,000,000	[2]
NextEra Energy Resources [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2012	1,970,000,000	[3]
Capacity payments and/or minimum payments - 2013	475,000,000	[3]
Capacity payments and/or minimum payments - 2014	140,000,000	[3]
Capacity payments and/or minimum payments - 2015	110,000,000	[3]
Capacity payments and/or minimum payments - 2016	100,000,000	[3]
Capacity payments and/or minimum payments - Thereafter	590,000,000	[3]
NextEra Energy Resources [Member] | Contract Group 1 [Member]
Long-term Purchase Commitment [Line Items]
Commitment amount included in capital expenditures	2,600,000,000
NextEra Energy Resources [Member] | Contract Group 1 [Member] | Minimum [Member]
Long-term Purchase Commitment [Line Items]
Expiration dates of purchase commitments	March 2012
NextEra Energy Resources [Member] | Contract Group 1 [Member] | Maximum [Member]
Long-term Purchase Commitment [Line Items]
Expiration dates of purchase commitments	2031
NextEra Energy Resources [Member] | Contract Group 2 [Member] | Minimum [Member]
Long-term Purchase Commitment [Line Items]
Expiration dates of purchase commitments	March 2012
NextEra Energy Resources [Member] | Contract Group 2 [Member] | Maximum [Member]
Long-term Purchase Commitment [Line Items]
Expiration dates of purchase commitments	2033
Corporate and Other [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2012	250,000,000
Capacity payments and/or minimum payments - 2013	15,000,000
Capacity payments and/or minimum payments - 2014	0
Capacity payments and/or minimum payments - 2015	0
Capacity payments and/or minimum payments - 2016	0
Capacity payments and/or minimum payments - Thereafter	$ 0

[1] Capacity charges under these contracts, substantially all of which are recoverable through the capacity clause, totaled approximately $511 million, $537 million and $603 million for the years ended December 31, 2011, 2010 and 2009, respectively. Energy charges under these contracts, which are recoverable through the fuel clause, totaled approximately $403 million, $434 million and $439 million for the years ended December 31, 2011, 2010 and 2009, respectively.

[2] Recoverable through the fuel clause.

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