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Derivatives Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2018 | Apr. 01, 2017 | Mar. 31, 2018 | Apr. 01, 2017
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Changes in value of hedged interest rate caps, net of tax of $0.3 and $(4.6) for the three and six months ended March 31, 2018 and $0.3 and $0.7 for the three and six months ended April 1, 2017: |  | $ 0.4 |  | $ 1.1
Interest rate cap - derivative |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Changes in value of hedged interest rate caps, net of tax of $0.3 and $(4.6) for the three and six months ended March 31, 2018 and $0.3 and $0.7 for the three and six months ended April 1, 2017: | $ 0.7 | $ 0.4 | $ (3.6) | $ 1.1

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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=84234895&loc=SL5624171-113959 + Details
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