Home >Financials > 2009 Annual Report - The Challenge to Deliver > NOTES TO THE FINANCIALSTATEMENTS > NOTE 3—SUMMARY OF SIGNIFICANT ACCOUNTINGPOLICIES > Allowance for Doubtful Accounts
We provide an allowance for doubtful accounts on outstanding receivables based on our collection history and an estimate of uncollectible accounts.
Allowance for Doubtful Accounts (dollars in millions)
2009
2008
2007
Beginning Balance
$41
$44
$48
Provision for Doubtful Accounts
6
7
12
Writeoffs
18
10
16
Ending Balance
$29