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SCHEDULE II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract] |
SCHEDULE II - Valuation and Qualifying Accounts | SCHEDULE II FEDERAL SIGNAL CORPORATION AND SUBSIDIARIES Valuation and Qualifying Accounts For the Years Ended December 31, 2013, 2012, and 2011
(in millions) | Balance at Beginning of Year |  | Additions Charged to Costs and Expenses |  | Deductions Accounts Written off Net of Recoveries |  | Balance at End of Year
Allowance for doubtful accounts: |  |  |  |  |  |  |
Year ended December 31, 2013 | $ | 2.4 |  |  | $ | — |  |  | $ | (0.1 | ) |  | $ | 2.3 |
Year ended December 31, 2012 | 2.4 |  |  | 0.6 |  |  | (0.6 | ) |  | 2.4 |
Year ended December 31, 2011 | 2.4 |  |  | 0.4 |  |  | (0.4 | ) |  | 2.4 |
Inventory obsolescence: |  |  |  |  |  |  |
Year ended December 31, 2013 | $ | 8.8 |  |  | $ | 3.1 |  |  | $ | (4.0 | ) |  | $ | 7.9 |
Year ended December 31, 2012 | 7.7 |  |  | 4.2 |  |  | (3.1 | ) |  | 8.8 |
Year ended December 31, 2011 | 7.4 |  |  | 2.3 |  |  | (2.0 | ) |  | 7.7 |
Income tax valuation allowances: |  |  |  |  |  |  |
Year ended December 31, 2013 | $ | 131.8 |  |  | $ | 2.5 |  |  | $ | (124.5 | ) |  | $ | 9.8 |
Year ended December 31, 2012 | 123.9 |  |  | 17.3 |  |  | (9.4 | ) |  | 131.8 |
Year ended December 31, 2011 | 112.8 |  |  | 11.2 |  |  | (0.1 | ) |  | 123.9 |

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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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