CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Common stock issuance cost					$ 1	$ 1	$ 1
Dividends per share of common stock	$ 0.725	[1]	$ 0.66	[1]	$ 2.90	$ 2.64	$ 2.40
Outstanding and unallocated shares held by the Employee Stock Ownership Plan (ESOP) Trust (in shares)	1		2		1	2	3
Original number of shares purchased and held by the ESOP Trust (in shares)	25		25		25	25	25

[1] In the opinion of NEE and FPL, all adjustments, which consist of normal recurring accruals necessary to present a fair statement of the amounts shown for such periods, have been made. Results of operations for an interim period generally will not give a true indication of results for the year.