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SCHEDULE II. VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2014
SCHEDULE II. VALUATION AND QUALIFYING ACCOUNTS |
SCHEDULE II. VALUATION AND QUALIFYING ACCOUNTS |
|  | (In Millions) |
Column A |  | Column B |  | Column C |  |  |  | Column D |  |  |  | Column E |
|  |  |  | Additions |  |  |  |  |  |  |  |  |
Description |  | Balance at Beginning of Period |  | Charged to Costs and Expenses |  | Charged to Other Accounts |  |  |  | Deductions |  |  |  | Balance at End of Period |
Allowances for doubtful accounts, deducted from accounts receivable in the balance sheet: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2014 |  | $ | 27 |  | $ | 6 |  | $ | — |  |  |  |  | $ | (15 | ) |  | (a | ) | $ | 18 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2013 |  | $ | 31 |  | $ | 8 |  | $ | — |  |  |  |  | $ | (12 | ) |  | (a | ) | $ | 27 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2012 |  | $ | 29 |  | $ | 13 |  | $ | — |  |  |  |  | $ | (11 | ) |  | (a | ) | $ | 31 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Valuation Allowance on deferred tax assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2014 |  | $ | 662 |  | $ | (539 | ) | $ | (57 | ) |  | (b | ) | $ | — |  |  |  |  | $ | 66 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2013 |  | $ | 785 |  | $ | (36 | ) | $ | (87 | ) |  | (c | ) | $ | — |  |  |  |  | $ | 662 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2012 |  | $ | 686 |  | $ | 113 |  | $ | (14 | ) |  | (c | ) | $ | — |  |  |  |  | $ | 785 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(a) | Deductions, representing uncollectible accounts written off, less recoveries of accounts written off in prior years.
(b) | Write off of a $55 million deferred tax asset on certain net operating loss carryforward against the valuation allowance as it was determined that there was only a remote likelihood that such a carryforward could be utilized; and $2 million valuation allowance on deferred tax assets recorded primarily in other comprehensive income.
(c) | Valuation allowance on deferred tax assets recorded primarily in other comprehensive income and paid in capital.

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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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