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Accounts Receivable, Net Accounts Receivable, Net (Details) - USD ($) $ in Millions	Sep. 30, 2019	Sep. 30, 2018
Accounts Receivable, Net
Power receivables	$ 1,624	$ 1,570
Other receivables	115	87
Allowance for uncollectible accounts	(1)
Accounts receivable, net	$ 1,739	$ 1,657

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