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Derivatives Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended
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Dec. 26, 2015 | Dec. 27, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Interest Rate Cap Agreements Aggregate Premium Payable |  | $ 13.2
Principal Amount Of Borrowings | $ 1,000.0 |
Interest Payment Duration | three-year |
Changes in value of hedged interest rate caps, net of tax of $0.2: | $ 0.3 | $ 0.0
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | 5.7 |
Interest Rate Cash Flow Hedge Asset at Fair Value | 7.3 |
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax | 1.0 |
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments | 0.4 |
Notional Amount | $ 97.7 |

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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=56946850&loc=SL5624171-113959 + Details
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- Definition Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments. + 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 (e) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959 + Details
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