CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Total property, plant and equipment - net	$ 67,196	$ 72,416
Customer receivables, allowances	5	7
Regulatory assets, Current	314	336
Other	3,170	4,719
Regulatory assets, noncurrent	2,597	2,469
Long-term debt	28,062	31,463
Current maturities of long-term debt ($72 and $70 related to a VIE, respectively)	$ 1,168	$ 1,676
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	800,000,000	800,000,000
Common stock, shares, outstanding (in shares)	471,000,000	471,000,000
Related to VIEs [Member]
Total property, plant and equipment - net	$ 10,199	$ 16,485
Regulatory assets, Current	72	71
Other	0	470
Regulatory assets, noncurrent	28	37
Noncontrolling interest in variable interest entity	3,287	1,006
Long-term debt	1,186	5,941
Current maturities of long-term debt ($72 and $70 related to a VIE, respectively)	72	70
FPL [Member]
Customer receivables, allowances	1	2
Regulatory assets, Current	313	335
Other	614	690
Long-term debt	11,803	11,236
Current maturities of long-term debt ($72 and $70 related to a VIE, respectively)	$ 93	$ 466
Common stock, shares authorized (in shares)	1,000	1,000
Common stock, shares, outstanding (in shares)	1,000	1,000
Common stock, shares, issued (in shares)	1,000	1,000
Common stock, no par value (in dollars per share)	$ 0	$ 0
FPL [Member] | Related to VIEs [Member]
Regulatory assets, Current	$ 72	$ 71
Regulatory assets, noncurrent	28	37
Long-term debt	35	74
Current maturities of long-term debt ($72 and $70 related to a VIE, respectively)	$ 72	$ 70