Commitments and Contingencies (Required Capacity and/or Minimum Payments Under Contracts) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
FPL [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments	$ 523,000,000		$ 511,000,000	$ 537,000,000
Energy payments	276,000,000		403,000,000	434,000,000
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 - 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	245,000,000	[1]
Capacity payments and/or minimum payments - 2017	250,000,000	[1]
Capacity payments and/or minimum payments - Thereafter	2,165,000,000	[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] | 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 - 2013	230,000,000	[1]
Capacity payments and/or minimum payments - 2014	220,000,000	[1]
Capacity payments and/or minimum payments - 2015	195,000,000	[1]
Capacity payments and/or minimum payments - 2016	70,000,000	[1]
Capacity payments and/or minimum payments - 2017	40,000,000	[1]
Capacity payments and/or minimum payments - Thereafter	115,000,000	[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 - 2013	1,995,000,000	[2]
Capacity payments and/or minimum payments - 2014	1,310,000,000	[2]
Capacity payments and/or minimum payments - 2015	570,000,000	[2]
Capacity payments and/or minimum payments - 2016	535,000,000	[2]
Capacity payments and/or minimum payments - 2017	530,000,000	[2]
Capacity payments and/or minimum payments - Thereafter	6,405,000,000	[2]
FPL [Member] | Coal Contract Minimum Payments [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2013	95,000,000	[2]
Capacity payments and/or minimum payments - 2014	35,000,000	[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 - 2017	0	[2]
Capacity payments and/or minimum payments - Thereafter	0	[2]
NextEra Energy Resources [Member]
Long-term Purchase Commitment [Line Items]
Capacity payments and/or minimum payments - 2013	860,000,000
Capacity payments and/or minimum payments - 2014	325,000,000
Capacity payments and/or minimum payments - 2015	95,000,000
Capacity payments and/or minimum payments - 2016	110,000,000
Capacity payments and/or minimum payments - 2017	65,000,000
Capacity payments and/or minimum payments - Thereafter	580,000,000
NextEra Energy Resources [Member] | Contract Group 1 [Member]
Long-term Purchase Commitment [Line Items]
Commitment amount included in capital expenditures	1,400,000,000
NextEra Energy Resources [Member] | Contract Group 1 [Member] | Minimum [Member]
Long-term Purchase Commitment [Line Items]
Expiration dates of purchase commitments	March 2013
NextEra Energy Resources [Member] | Contract Group 1 [Member] | Maximum [Member]
Long-term Purchase Commitment [Line Items]
Expiration dates of purchase commitments	2030
NextEra Energy Resources [Member] | Contract Group 2 [Member] | Minimum [Member]
Long-term Purchase Commitment [Line Items]
Expiration dates of purchase commitments	March 2013
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 - 2013	45,000,000	[3]
Capacity payments and/or minimum payments - 2014	10,000,000	[3]
Capacity payments and/or minimum payments - 2015	15,000,000	[3]
Capacity payments and/or minimum payments - 2016	10,000,000	[3]
Capacity payments and/or minimum payments - 2017	10,000,000	[3]
Capacity payments and/or minimum payments - Thereafter	10,000,000	[3]
commitment to invest	$ 68,000,000

[1] Capacity charges under these contracts, substantially all of which are recoverable through the capacity clause, totaled approximately $523 million, $511 million and $537 million for the years ended December 31, 2012, 2011 and 2010, respectively. Energy charges under these contracts, which are recoverable through the fuel clause, totaled approximately $276 million, $403 million and $434 million for the years ended December 31, 2012, 2011 and 2010, respectively.

[2] Recoverable through the fuel clause.

[3] Includes an approximately $68 million commitment to invest in clean power and technology businesses through 2021.