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Contingencies and Commitments (Details) - Civil lawsuit - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended | 21 Months Ended
--- | --- | --- | ---
Jan. 27, 2018 | Apr. 30, 2016 | Oct. 31, 2017
Initial verdict |  |  |
Contingencies and Commitments |  |  |
Expense recognized |  | $ 5.5 |
Accrual of royalties and interest |  |  |
Contingencies and Commitments |  |  |
Expense recognized |  |  | $ 3.9
Agreement to settle |  |  |
Contingencies and Commitments |  |  |
Expense recognized | $ 4.1 |  |
Agreed settlement amount | $ 13.5 |  |

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- Definition Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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