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CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Total property, plant and equipment - net	$ 74,794	$ 70,334
Customer receivables, allowances	7	10
Regulatory assets, current	450	448
Assets held for sale	1,334	0
Long-term debt	29,883	26,782
Current portion of long-term debt	2,614	2,716
Liabilities associated with assets held for sale	$ 1,180	$ 0
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)	479,000,000	478,000,000
Related to VIEs [Member]
Total property, plant and equipment - net	$ 10,219	$ 10,553
Regulatory assets, current	23	41
Assets held for sale	343	0
Noncontrolling interest in variable interest entity	3,610	3,265
Long-term debt	984	1,020
Current portion of long-term debt	36	74
Liabilities associated with assets held for sale	141	0
FPL [Member]
Customer receivables, allowances	1	3
Regulatory assets, current	399	447
Long-term debt	12,323	11,688
Current portion of long-term debt	$ 56	$ 95
Common stock, no par value (in dollars per share)	$ 0	$ 0
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
FPL [Member] | Related to VIEs [Member]
Regulatory assets, current	$ 23	$ 41
Current portion of long-term debt	$ 36	$ 74

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