Fair Value Measurements (Available for Sale Securities) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 FPL [Member]	Jun. 30, 2013 FPL [Member]	Jun. 30, 2014 FPL [Member]	Jun. 30, 2013 FPL [Member]	Jun. 30, 2014 Available For Sale Securities: Special Use Funds - Equity Securities [Member]	Dec. 31, 2013 Available For Sale Securities: Special Use Funds - Equity Securities [Member]	Jun. 30, 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]	Jun. 30, 2014 available for sale securities: Special Use Funds - Debt Securities [Member]		Dec. 31, 2013 available for sale securities: Special Use Funds - Debt Securities [Member]		Jun. 30, 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													$ 5	[1]	$ 32	[1]	$ 4	[1]	$ 25	[1]
Unrealized gains									1,200	1,125	838	777	64		42		53		36
Realized Gains	71	21	148	63	56	8	88	31
Realized Losses	83	13	105	43	76	8	93	30
Proceeds from Sale and Maturity of Available-for-sale Securities	813	858	2,214	1,782	637	669	1,799	1,354
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value													$ 305		$ 1,069		$ 231		$ 844

[1] Unrealized losses on available for sale debt securities for securities in an unrealized loss position for greater than twelve months at June 30, 2014 and December 31, 2013 were not material to NEE or FPL.