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SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2015
Schedule II-Valuation and Qualifying Accounts |
Schedule II-Valuation and Qualifying Accounts | Schedule II—Valuation and Qualifying Accounts (US$ in millions)
Description |  | Balance at beginning of period |  | Charged to costs and expenses |  | Charged to other accounts(b) |  | Deductions from reserves |  | Balance at end of period |
FOR THE YEAR ENDED DECEMBER 31, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowances for doubtful accounts(a) |  | $ | 292 |  |  | 73 |  |  | (18 | ) |  | (64) | (c) | $ | 283 |
Allowances for secured advances to suppliers |  | $ | 78 |  |  | 34 |  |  | (10 | ) |  | (27 | ) | $ | 75 |
Allowances for recoverable taxes |  | $ | 105 |  |  | 19 |  |  | (2 | ) |  | (52 | ) | $ | 70 |
Income tax valuation allowances |  | $ | 455 |  |  | 642 |  |  | (49) | (d) |  | — |  | $ | 1,048 |
FOR THE YEAR ENDED DECEMBER 31, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowances for doubtful accounts(a) |  | $ | 283 |  |  | 71 |  |  | (23 | ) |  | (84) | (c) | $ | 247 |
Allowances for secured advances to suppliers |  | $ | 75 |  |  | 9 |  |  | (7 | ) |  | (16 | ) | $ | 61 |
Allowances for recoverable taxes |  | $ | 70 |  |  | 7 |  |  | (14 | ) |  | (20 | ) | $ | 43 |
Income tax valuation allowances |  | $ | 1,048 |  |  | 76 |  |  | (46) | (d) |  | — |  | $ | 1,078 |
FOR THE YEAR ENDED DECEMBER 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowances for doubtful accounts(a) |  | $ | 247 |  |  | 64 |  |  | (47 | ) |  | (54) | (c) | $ | 210 |
Allowances for secured advances to suppliers |  | $ | 61 |  |  | 11 |  |  | (21 | ) |  | (9 | ) | $ | 42 |
Allowances for recoverable taxes |  | $ | 43 |  |  | 7 |  |  | (16 | ) |  | (2 | ) | $ | 32 |
Income tax valuation allowances |  | $ | 1,078 |  |  | 44 |  |  | (324) | (d) |  | — |  | $ | 798 |
(a) | This includes an allowance for doubtful accounts for current and non-current trade accounts receivables.
(b) | This consists primarily of foreign exchange translation adjustments.
(c) | Such amounts include write-offs of uncollectible accounts and recoveries.
(d) | Includes primarily cumulative translation adjustments.

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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