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Revenue Reserves (Details 1) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
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Total reserves | $ 761.6 | $ 605.5 | $ 662.7 | $ 483.8
Reduction of accounts receivable |  |  |  |
Total reserves | 189.6 | 166.9 |  |
Component of accrued expenses and other |  |  |  |
Total reserves | $ 572.0 | $ 438.6 |  |

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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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