Fair Value Measurements (Available for Sale Securities) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Schedule of Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds [Line Items]
Realized gains	$ 246		$ 252		$ 183
Realized losses	88		67		88
Proceeds from sale and maturity of Available-for-sale Securities	4,190		5,028		4,348
FPL [Member]
Schedule of Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds [Line Items]
Realized gains	182		98		74
Realized losses	59		46		62
Proceeds from sale and maturity of Available-for-sale Securities	3,342		3,790		2,988
Available For Sale Securities: Special Use Funds - Equity Securities [Member]
Schedule of Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds [Line Items]
Unrealized gains	1,125		680
Available For Sale Securities: Special Use Funds - Equity Securities [Member] | FPL [Member]
Schedule of Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds [Line Items]
Unrealized gains	777		521
Available for sale securities: Special Use Funds - Debt Securities [Member]
Schedule of Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds [Line Items]
Unrealized gains	42		92
Unrealized losses	32	[1]	3	[1]
Fair Value	1,069		277
Available for sale securities: Special Use Funds - Debt Securities [Member] | FPL [Member]
Schedule of Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds [Line Items]
Unrealized gains	36		77
Unrealized losses	25	[1]	2	[1]
Fair Value	$ 844		$ 223

[1] Unrealized losses on available for sale debt securities for securities in an unrealized loss position for greater than twelve months at December 31, 2013 and 2012 were not material to NEE or FPL.