TD Ameritrade 2018 Annual Report

TD AMERITRADE HOLDING CORPORATION NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued) 67 5. Receivable from and Payable to Brokers, Dealers and Clearing Organizations Amounts receivable from and payable to brokers, dealers and clearing organizations consist of the following (dollars in millions): September 30, 2018 2017 Receivable: Deposits paid for securities borrowed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 803 $1,154 Clearing organizations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 545 151 Broker-dealers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 21 Securities failed to deliver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8 Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $1,374 $1,334 Payable: Deposits received for securities loaned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $2,914 $2,449 Securities failed to receive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 21 Clearing organizations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 32 Broker-dealers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $2,980 $2,504 6. Allowance for Doubtful Accounts on Receivables The following table summarizes activity in the Company's allowance for doubtful accounts on client and other receivables for the fiscal years indicated (dollars in millions): 2018 2017 2016 Beginning balance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 11 $ 9 $ 12 Provision for doubtful accounts, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 2 2 Acquired in business acquisition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . — 2 — Write-off of doubtful accounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (13) (2) (5) Ending balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 54 $ 11 $ 9