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Derivatives Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions | 3 Months Ended
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Dec. 31, 2016 | Dec. 26, 2015
Derivative Instruments, Gain (Loss) [Line Items] |  |
Changes in value of hedged interest rate caps, net of tax of $0.5 and $0.2 for the three months ended December 31, 2016 and December 26, 2015: | $ 0.7 | $ 0.3
Interest rate cap - derivative |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Changes in value of hedged interest rate caps, net of tax of $0.5 and $0.2 for the three months ended December 31, 2016 and December 26, 2015: | $ 0.7 | $ 0.3

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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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