Common and Preferred Stock (Additional Disclosures Regarding Common and Preferred Stock) (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accelerated Share Repurchase [Abstract]
Stock repurchased during period, shares	6,700,000
Stock repurchased, price per share	$ 55.76
Stock repurchased, aggregate price	$ 375
Continuous offering of NextEra Energy common stock [Abstract]
Continuous Offering of NextEra Energy Common Stock - maximum gross sales price		400
Continuous Offering of NextEra Energy Common Stock - gross proceeds		$ 240	$ 160
NextEra Energy [Member] | Serial Preferred Stock [Member]
Preferred stock [Abstract]
Authorized (in shares)	100,000,000
Par value (in dollars per share)	$ 0.01
Outstanding (in shares)	0