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Schedule II - Valuation Accounts and Reserves | 12 Months Ended
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Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract] |
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] | Schedule II – Valuation Accounts and Reserves (in millions)
Year ended December 31, 2015 | Balance at beginning of period |  | Additions |  | Net deductions and other |  | Balance at end of period
Doubtful accounts and allowances | $ | 47 |  | $ | 1 |  |  |  |  | $ | 48
Deferred tax valuation allowance | $ | 298 |  | $ | 30 |  | $ | 90 |  | $ | 238
Accumulated amortization of purchased intangible assets | $ | 216 |  | $ | 49 |  |  |  |  | $ | 265
Reserves for accrued costs of business restructuring | $ | 44 |  |  |  |  | $ | 41 |  | $ | 3
Year ended December 31, 2014 | Balance at beginning of period |  | Additions |  | Net deductions and other |  | Balance at end of period
Doubtful accounts and allowances | $ | 28 |  | $ | 19 |  |  |  |  | $ | 47
Deferred tax valuation allowance | $ | 286 |  | $ | 186 |  | $ | 174 |  | $ | 298
Accumulated amortization of purchased intangible assets | $ | 185 |  | $ | 31 |  |  |  |  | $ | 216
Reserves for accrued costs of business restructuring | $ | 44 |  | $ | 49 |  | $ | 49 |  | $ | 44
Year ended December 31, 2013 | Balance at beginning of period |  | Additions |  | Net deductions and other |  | Balance at end of period
Doubtful accounts and allowances | $ | 26 |  | $ | 2 |  |  |  |  | $ | 28
Deferred tax valuation allowance | $ | 210 |  | $ | 80 |  | $ | 4 |  | $ | 286
Accumulated amortization of purchased intangible assets | $ | 154 |  | $ | 31 |  |  |  |  | $ | 185
Reserves for accrued costs of business restructuring | $ | 42 |  | $ | 41 |  | $ | 39 |  | $ | 44

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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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- References No definition available. + Details
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