Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Impairment of Long-Lived Assets Held-for-use	$ 300		$ 0		$ 51
Federal:
Current(a)	(145)		(4)		(35)
Deferred	874		636		572
Total federal	729		632		537
State:
Current(a)	69		14		11
Deferred	3		46		(19)
Total state	72		60		(8)
Total income taxes	801		692		529
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Statutory federal income tax rate (in hundredths)	35.00%		35.00%		35.00%
Increases (reductions) resulting from:
State income taxes - net of federal income tax benefit (in hundredths)	1.90%		1.50%		(0.20%)
PTCs and ITCs - NEER (in hundredths)	(8.30%)		(7.80%)		(11.10%)
Convertible ITCs - NEER (in hundredths)	(2.40%)		(1.50%)		(0.10%)
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance	5.10%	[1]	0.00%		0.00%
Other - net (in hundredths)	0.50%		(0.60%)		(2.00%)
Effective income tax rate (in hundredths)	31.80%		26.60%		21.60%
Deferred tax liabilities:
Property-related	11,247		10,206
Pension	567		403
Storm reserve deficiency	180		212
Nuclear decommissioning trusts	188		115
Nuclear decommissioning trusts	260		245
Other	686		563
Total deferred tax liabilities	13,128		11,744
Deferred tax assets and valuation allowance:
Decommissioning reserves	431		418
Postretirement benefits	145		162
Net operating loss carryforwards	1,343		1,216
Tax credit carryforwards	2,522		2,312
ARO and accrued asset removal costs	795		832
Other	959		790
Valuation allowance(a)	(325)	[2]	(192)	[2]
Net deferred tax assets	5,870		5,538
Net accumulated deferred income taxes	7,258		6,206
Deferred tax assets and liabilities included in the consolidated balance sheets [Abstract]
Deferred income taxes - current assets	753		397	[3]
Noncurrent other assets	139		113
Other current liabilities	(6)		(13)
Deferred income taxes - noncurrent liabilities	(8,144)		(6,703)
Net accumulated deferred income taxes	(7,258)		(6,206)
FPL [Member]
Federal:
Current(a)	174		(261)		(64)
Deferred	540		906		622
Total federal	714		645		558
State:
Current(a)	44		26		43
Deferred	77		81		53
Total state	121		107		96
Total income taxes	835		752		654
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Statutory federal income tax rate (in hundredths)	35.00%		35.00%		35.00%
Increases (reductions) resulting from:
State income taxes - net of federal income tax benefit (in hundredths)	3.60%		3.50%		3.60%
PTCs and ITCs - NEER (in hundredths)	0.00%		0.00%		0.00%
Convertible ITCs - NEER (in hundredths)	0.00%		0.00%		0.00%
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance	0.00%		0.00%		0.00%
Other - net (in hundredths)	(0.40%)		(0.70%)		(0.60%)
Effective income tax rate (in hundredths)	38.20%		37.80%		38.00%
Deferred tax liabilities:
Property-related	6,948		6,193
Pension	441		438
Storm reserve deficiency	180		212
Nuclear decommissioning trusts	0		0
Nuclear decommissioning trusts	0		0
Other	219		162
Total deferred tax liabilities	7,788		7,005
Deferred tax assets and valuation allowance:
Decommissioning reserves	361		348
Postretirement benefits	107		114
Net operating loss carryforwards	96		6
Tax credit carryforwards	0		0
ARO and accrued asset removal costs	670		723
Other	297		197
Valuation allowance(a)	0	[2]	0	[2]
Net deferred tax assets	1,531		1,388
Net accumulated deferred income taxes	6,257		5,617
Deferred tax assets and liabilities included in the consolidated balance sheets [Abstract]
Deferred income taxes - current assets	98	[4]	0
Noncurrent other assets	0		0
Other current liabilities	0		(33)
Deferred income taxes - noncurrent liabilities	(6,355)		(5,584)
Net accumulated deferred income taxes	$ (6,257)		$ (5,617)

[1] Reflects a full valuation allowance on deferred tax assets associated with the Spain solar projects. See Note 4 - Nonrecurring Fair Value Measurements

[2] Amount relates to a valuation allowance related to the Spain solar projects, deferred state tax credits and state operating loss carryforwards.

[3] NEE reclassified approximately $430 million of federal operating loss carryforwards from current deferred income taxes to noncurrent deferred income taxes in the first quarter of 2013 as a result of increased tax depreciation deductions available under the American Taxpayer Relief Act of 2012, which was enacted in January 2013.

[4] Included in other current assets on FPL's consolidated balance sheets.