Equity (Additional Disclosures Regarding Common and Preferred Stock) (Details)	Dec. 31, 2018 $ / shares shares
NextEra Energy [Member] | Serial Preferred Stock [Member]
Preferred stock [Abstract]
Authorized (in shares)	100,000,000
Par value (in dollars per share) | $ / shares	$ 0.01
Outstanding (in shares)	0
Preferred Stock, $100 Par Value [Member] | FPL [Member]
Preferred stock [Abstract]
Authorized (in shares)	10,414,100
Par value (in dollars per share) | $ / shares	$ 100
Preferred Stock, No Par Value [Member] | FPL [Member]
Preferred stock [Abstract]
Authorized (in shares)	5,000,000
Par value (in dollars per share) | $ / shares	$ 0
Outstanding (in shares)	0
Preferred Stock, No Par Value [Member] | FPL [Member] | Subordinated Preferred Stock [Member]
Preferred stock [Abstract]
Authorized (in shares)	5,000,000
Par value (in dollars per share) | $ / shares	$ 0
Outstanding (in shares)	0