Fair Value Measurements (Available for Sale Securities) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 FPL [Member]	Mar. 31, 2013 FPL [Member]	Mar. 31, 2014 Available For Sale Securities: Special Use Funds - Equity Securities [Member]	Dec. 31, 2013 Available For Sale Securities: Special Use Funds - Equity Securities [Member]	Mar. 31, 2014 Available For Sale Securities: Special Use Funds - Equity Securities [Member] FPL [Member]	Dec. 31, 2013 Available For Sale Securities: Special Use Funds - Equity Securities [Member] FPL [Member]	Mar. 31, 2014 available for sale securities: Special Use Funds - Debt Securities [Member]		Dec. 31, 2013 available for sale securities: Special Use Funds - Debt Securities [Member]		Mar. 31, 2014 available for sale securities: Special Use Funds - Debt Securities [Member] FPL [Member]		Dec. 31, 2013 available for sale securities: Special Use Funds - Debt Securities [Member] FPL [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized Loss									$ 12	[1]	$ 32	[1]	$ 10	[1]	$ 25	[1]
Unrealized gains					1,105	1,125	780	777	49		42		41		36
Realized Gains	77	42	32	23
Realized Losses	22	30	17	22
Proceeds from Sale and Maturity of Available-for-sale Securities	1,401	924	1,162	685
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value									$ 660		$ 1,069		$ 516		$ 844

[1] Unrealized losses on available for sale debt securities for securities in an unrealized loss position for greater than twelve months at March 31, 2014 and December 31, 2013 were not material to NEE or FPL.