CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
PROPERTY, PLANT AND EQUIPMENT
Total property, plant and equipment - net	$ 69,656	$ 66,912
CURRENT ASSETS
Customer receivables, allowances	7	5
OTHER ASSETS
Other investments	2,950	2,482
Regulatory assets ($76 and $107 related to a VIE, respectively)	$ 2,226	$ 1,894
CAPITALIZATION
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized	800,000,000	800,000,000
Common Stock, Shares, Outstanding	469,000,000	468,000,000
Long-term debt	$ 30,392	$ 27,818
Related to VIEs [Member]
PROPERTY, PLANT AND EQUIPMENT
Total property, plant and equipment - net	13,807	14,632
OTHER ASSETS
Other investments	474	479
Regulatory assets ($76 and $107 related to a VIE, respectively)	76	107
CAPITALIZATION
Long-term debt	5,658	5,080
FPL [Member]
CURRENT ASSETS
Customer receivables, allowances	$ 4	$ 2
CAPITALIZATION
Common Stock, No Par Value (in dollars per share)	$ 0	$ 0
Common Stock, Shares Authorized	1,000	1,000
Common Stock, Shares, Outstanding	1,000	1,000
Common Stock, Shares, Issued	1,000	1,000
Long-term debt	$ 10,088	$ 9,705
FPL [Member] | Related to VIEs [Member]
OTHER ASSETS
Regulatory assets ($76 and $107 related to a VIE, respectively)	76	107
CAPITALIZATION
Long-term debt	$ 107	$ 144