Comprehensive Income (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Comprehensive Income [Abstract]
Net income of NextEra Energy	$ 580	$ 417	$ 848	$ 973
Net unrealized gains (losses) on cash flow hedges:
Effective portion of net unrealized gains (losses), net of tax	(81)	(40)	(91)	(52)
Reclassification from AOCI to net income, net of tax	4	(18)	21	(27)
Net unrealized gains (losses) on available for sale securities:
Net unrealized gains (losses) on securities still held, net of tax	1	(32)	23	(13)
Reclassification from AOCI to net income, net of tax	(13)	(5)	(22)	(14)
Defined benefit pension and other benefits plans, net of tax		0	6	0
Net unrealized gains (losses) on foreign currency translation, net of tax	2	(12)	12	(14)
Comprehensive income of NextEra Energy	493	310	797	853
Other comprehensive income, tax [Abstract]
Tax expense (benefit) of unrealized gains/losses on cash flow hedges	(28)	(24)	(33)	(30)
Tax expense (benefit) on cash flow hedges reclassified from AOCI to net income	(1)	(13)	7	(21)
Tax expense (benefit) of unrealized gains/losses on available for sale securities still held	1	(22)	15	(6)
Tax expense (benefit) on available for sale securities reclassified from AOCI to net income	(9)	(4)	(14)	(11)
Tax expense (benefit) of defined benefit pension and other benefits plans			4
Tax expense (benefit) of foreign currency translation	1	(6)	6	(7)
Total gain (loss) to be reclassified during next 12 months			$ (13)