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Accounts Receivable, Net (Details) - USD ($) $ in Millions	Dec. 31, 2018	Sep. 30, 2018
Accounts Receivable, Net
Power receivables	$ 1,465	$ 1,570
Other receivables	76	87
Allowance for uncollectible accounts	1	1
Accounts receivable, net	$ 1,541	$ 1,657

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business.

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Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Amount, before allowance, of receivables classified as other, due within one year or the operating cycle, if longer.

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