Commitments and Contingencies (Required Capacity and/or Minimum Payments Under Contracts) (Details) (USD $)	12 Months Ended										12 Months Ended	0 Months Ended												12 Months Ended
	Dec. 31, 2013 FPL [Member]	Dec. 31, 2012 FPL [Member]	Dec. 31, 2011 FPL [Member]	Dec. 31, 2013 FPL [Member] Jea and Southern Subsidiaries Contract Range 1 [Member] MW	Dec. 31, 2013 FPL [Member] Jea and Southern Subsidiaries Contract Range 2 [Member] MW	Dec. 31, 2013 FPL [Member] Qualifying Facilities Contracts [Member] MW	Dec. 31, 2013 FPL [Member] Qualifying Facilities Contracts [Member] Minimum [Member]	Dec. 31, 2013 FPL [Member] Qualifying Facilities Contracts [Member] Maximum [Member]	Dec. 31, 2013 FPL [Member] Qualifying Facilities Contracts Capacity Payments [Member]		Dec. 31, 2013 FPL [Member] Natural Gas, Coal, and Oil, Including Transportation and Storage [Member]	May 01, 2017 FPL [Member] Sabal Trail and Florida Southeast Connection [Member] Forecast [Member] MMBTU	Dec. 31, 2013 FPL [Member] JEA and Southern Subsidiaries Capacity Payments [Member]		Dec. 31, 2013 FPL [Member] Natural Gas Including Transportation and Storage Contract Minimum Payments [Member]		Dec. 31, 2013 FPL [Member] Natural Gas Including Transportation and Storage Contract Minimum Payments [Member] Sabal Trail and Florida Southeast Connection [Member]	Dec. 31, 2013 FPL [Member] Coal Contract Minimum Payments [Member]		Dec. 31, 2013 NEECH [Member]	Dec. 31, 2013 NEECH [Member] Sabal Trail Transmission, LLC [Member]	Dec. 31, 2013 NEER [Member]	Dec. 31, 2013 NEER [Member] Contract Group 1 [Member]	Dec. 31, 2013 NEER [Member] Contract Group 1 [Member] Minimum [Member]	Dec. 31, 2013 NEER [Member] Contract Group 1 [Member] Maximum [Member]	Dec. 31, 2013 NEER [Member] Contract Group 2 [Member] Minimum [Member]	Dec. 31, 2013 NEER [Member] Contract Group 2 [Member] Maximum [Member]	Dec. 31, 2013 Corporate and Other [Member]
Long-term Purchase Commitment [Line Items]
Ownership interest																				100.00%	33.00%
Minimum annual purchase commitments (in megawatts)				1,330	375	705
Time period under contracts				through 2015	through 2021		2024	2034			through 2036	25-year
Expiration dates of purchase commitments																								April 2014	2030	March 2014	2033
Commitment amount included in capital expenditures																							$ 1,600,000,000
Capacity payments and/or minimum payments - 2014									285,000,000	[1]			215,000,000	[1]	1,520,000,000	[2]		65,000,000	[2]			1,220,000,000						90,000,000	[3],[4]
Capacity payments and/or minimum payments - 2015									290,000,000	[1]			195,000,000	[1]	605,000,000	[2]		40,000,000	[2]			145,000,000						220,000,000	[3],[4]
Capacity payments and/or minimum payments - 2016									250,000,000	[1]			70,000,000	[1]	550,000,000	[2]		20,000,000	[2]			170,000,000						460,000,000	[3],[4]
Capacity payments and/or minimum payments - 2017									255,000,000	[1]			50,000,000	[1]	745,000,000	[2]	198,000,000	0	[2]			100,000,000						180,000,000	[3],[4]
Capacity payments and/or minimum payments - 2018									260,000,000	[1]			10,000,000	[1]	825,000,000	[2]	294,000,000	0	[2]			105,000,000						20,000,000	[3],[4]
Capacity payments and/or minimum payments - Thereafter									1,965,000,000	[1]			0	[1]	14,510,000,000	[2]	8,528,000,000	0	[2]			490,000,000						55,000,000	[3],[4]
Capacity payments	487,000,000	523,000,000	511,000,000
Energy payments	263,000,000	276,000,000	403,000,000
Commitment to invest																				900,000,000								52,000,000
Joint obligations																												$ 68,000,000
Long Term Purchase Commitment, Initial Volume Required												400,000
Long Term Purchase Commitment, Increased Volume Required												600,000

[1] Capacity charges under these contracts, substantially all of which are recoverable through the capacity clause, totaled approximately $487 million, $523 million and $511 million for the years ended December 31, 2013, 2012 and 2011, respectively. Energy charges under these contracts, which are recoverable through the fuel clause, totaled approximately $263 million, $276 million and $403 million for the years ended December 31, 2013, 2012 and 2011, respectively.

[2] Recoverable through the fuel clause. Includes approximately $198 million, $294 million and $8,528 million in 2017, 2018 and thereafter, respectively, of firm commitments, subject to certain conditions as noted above, related to the natural gas transportation agreements with Sabal Trail and Florida Southeast Connection.

[3] Includes an approximately $52 million commitment to invest in clean power and technology businesses through 2021.

[4] Excludes approximately $68 million, in 2014, of joint obligations of NEECH and NEER which are included in NEER amounts above.