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Components of Deferred Tax Assets (Details) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | --- | --- | ---
Deferred Tax Assets, Net [Abstract] |  |  |  |
Postretirement/post-employment benefits | $ 25.3 | $ 27.4 |  |
Deferred compensation | 193.4 | 191.2 |  |
Pension costs | 25.8 | 41.4 |  |
Basis differences in fixed assets | (67.5) | (38.5) |  |
Rent | 41.1 | 45.8 |  |
Interest | 60.9 | 60.9 |  |
Accruals and reserves | 29.4 | 34.8 |  |
Allowance for doubtful accounts | 10.8 | 10.8 |  |
Basis differences in intangible assets | (408.2) | (412.3) |  |
Investments in equity securities | (8.3) | (2.6) |  |
Tax loss/tax credit carry forwards | 354.5 | 404.4 |  |
Restructuring and other reorganization-related costs | 0.4 | (0.3) |  |
Prepaid expenses | (2.3) | 0.0 |  |
Other | 59.9 | 59.2 |  |
Total Deferred Tax Assets, Net | 315.2 | 422.2 |  |
Valuation allowance | (275.1) | (332.2) | $ (467.3) | $ (392.9)
Net Deferred Tax Assets | $ 40.1 | $ 90.0 |  |

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- Definition The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from employee benefit costs not otherwise specified in the taxonomy, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51675352&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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