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Per unit of ownership amount of cash distributions paid to unit-holder of a limited liability company (LLC).

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Date the declared dividend will be paid, in CCYY-MM-DD format.

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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ / shares in Units, $ in Millions	Oct. 29, 2019	Sep. 30, 2019	Dec. 31, 2018
Cash and Cash Equivalents, at Carrying Value, Ending Balance		$ 148	$ 407
Accounts Receivable Reclassified to Noncurrent Assets		5
Common Class A and C [Member] \| Subsequent Event [Member]
Dividends Payable, Date Declared	Oct. 29, 2019
Dividends Payable, Amount Per Share	$ 0.20
Dividends Payable, Date to be Paid	Dec. 16, 2019
Dividends Payable, Date of Record	Dec. 02, 2019
Operating Funds [Member]
Restricted Cash and Cash Equivalents, Total		78
Current Debt Service Payments [Member]
Restricted Cash and Cash Equivalents, Total		70
Reserves [Member]
Restricted Cash and Cash Equivalents, Total		53
Cash Distributions Reserve [Member]
Restricted Cash and Cash Equivalents, Total		48
Cash Affected by Bankruptcy [Member]
Restricted Cash and Cash Equivalents, Total		36
Project Level Subsidiaries [Member]
Restricted Cash and Cash Equivalents, Total		147
Project Level Subsidiaries [Member]
Cash and Cash Equivalents, at Carrying Value, Ending Balance		$ 116	$ 109
Clearway Energy, LLC [Member] \| Common Class B and D [Member]
Distribution Made to Limited Liability Company (LLC) Member, Distributions Paid, Per Unit	$ 0.20