v3.3.1.900

Schedule II - Valuation and Qualifying Accounts (Tables) | 12 Months Ended
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Dec. 31, 2015
Valuation and Qualifying Accounts Disclosure [Line Items] |
Schedule of Valuation and Qualifying Accounts Disclosure | SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
|  |  | Additions |  |  |  |  |  |
| Balance at Beginning of Period |  | Charged to Costs and Expenses |  | Deductions |  | Other Activity |  | Balance at End of Period
| (in millions)
December 31, 2015: |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 21 |  |  | $ | 11 |  |  | $ | (7 | ) |  | $ | 1 |  |  | $ | 26 |
Tax valuation allowance (a) | $ | 747 |  |  | $ | 192 |  |  | $ | — |  |  | $ | (29 | ) |  | $ | 910 |
December 31, 2014: |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts (b) | $ | 60 |  |  | $ | 10 |  |  | $ | (5 | ) |  | $ | (44 | ) |  | $ | 21 |
Tax valuation allowance (a) | $ | 642 |  |  | $ | 187 |  |  | $ | (15 | ) |  | $ | (67 | ) |  | $ | 747 |
December 31, 2013: |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 61 |  |  | $ | 7 |  |  | $ | (9 | ) |  | $ | 1 |  |  | $ | 60 |
Tax valuation allowance (a) | $ | 502 |  |  | $ | 125 |  |  | $ | (17 | ) |  | $ | 32 |  |  | $ | 642 |
(a) | Additions Charged to Costs and Expenses are primarily related to taxable losses for which the tax benefit has been reserved.
(b) | Other Activity primarily represents the reclassification of balances related to billing adjustments to accounts receivable.

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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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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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