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Schedule II - Valuation and Qualifying Accounts (Notes) | 12 Months Ended
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Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract] |
Schedule of Valuation and Qualifying Accounts | Schedule II - Valuation and Qualifying Accounts
($ in millions) | Balance at beginning of period | Charged to costs and expenses | Deductions (1) | Balance at end of period
For the year ended December 31, 2014 |  |  |  |
Allowances deducted from assets: |  |  |  |
Deferred tax asset valuation allowance | $ | 23.5 |  | $ | (0.9 | ) | $ | (0.5 | ) | $ | 22.1 |
Allowance for doubtful accounts | 0.8 |  | 0.4 |  | (0.3 | ) | 0.9 |
Total allowances deducted from assets | $ | 24.3 |  | $ | (0.5 | ) | $ | (0.8 | ) | $ | 23.0 |
For the year ended December 31, 2013 |  |  |  |
Allowances deducted from assets: |  |  |  |
Deferred tax asset valuation allowance | $ | 20.4 |  | $ | 2.8 |  | $ | 0.3 |  | $ | 23.5 |
Allowance for doubtful accounts | 0.5 |  | — |  | 0.3 |  | 0.8 |
Total allowances deducted from assets | $ | 20.9 |  | $ | 2.8 |  | $ | 0.6 |  | $ | 24.3 |
For the year ended December 31, 2012 |  |  |  |
Allowances deducted from assets: |  |  |  |
Deferred tax asset valuation allowance | $ | 19.3 |  | $ | 0.6 |  | $ | 0.5 |  | $ | 20.4 |
Allowance for doubtful accounts | 0.3 |  | 0.3 |  | (0.1 | ) | 0.5 |
Total allowances deducted from assets | $ | 19.6 |  | $ | 0.9 |  | $ | 0.4 |  | $ | 20.9 |
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(1) | Includes accounts receivable written off, the write-off or write-down of valuation allowances, and 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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