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Borrowings and Credit Arrangements (Tables) | 12 Months Ended
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Sep. 24, 2016
Debt Disclosure [Abstract] |
Company's Borrowings | The Company’s borrowings consisted of the following:
| September 24, 2016 |  | September 26, 2015
Current debt obligations, net of debt discount and issuance costs: |  |  |
Term Loan | $ | 83.8 |  |  | $ | 74.4 |
Revolver | — |  |  | 175.0 |
Securitization Program | 200.0 |  |  | — |
Convertible Notes | 12.2 |  |  | 141.8 |
Total current debt obligations | 296.0 |  |  | 391.2 |
Long-term debt obligations, net of debt discount and issuance costs: |  |  |
Term Loan | 1,308.2 |  |  | 1,388.3 |
2022 Senior Notes | 977.7 |  |  | 973.9 |
Convertible Notes | 763.5 |  |  | 858.8 |
Total long-term debt obligations | 3,049.4 |  |  | 3,221.0 |
Total debt obligations | $ | 3,345.4 |  |  | $ | 3,612.2 |
Schedule Of Long Term Debt By Maturity Table [Text Block] | The debt maturity schedule for the Company’s obligations as of September 24, 2016 is as follows:
|  | 2017 |  | 2018 |  | 2019 |  | 2020 |  | 2021 |  | 2022 and Thereafter |  | Total
Term Loan |  | $ | 84.4 |  |  | $ | 121.9 |  |  | $ | 150.0 |  |  | $ | 1,050.0 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,406.3 |
Securitization Program |  | 200.0 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 200.0 |
2022 Senior Notes |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,000.0 |  |  | 1,000.0 |
Convertible Notes (1) |  | 12.3 |  |  | 790.4 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 802.7 |
|  | $ | 296.7 |  |  | $ | 912.3 |  |  | $ | 150.0 |  |  | $ | 1,050.0 |  |  | $ | — |  |  | $ | 1,000.0 |  |  | $ | 3,409.0 |
(1) | Classified based on the earliest date of redemption for each respective issuance. In addition, the balance in fiscal 2018 reflects accretion on the 2013 Notes through September 24, 2016.
Schedule Of Convertible Notes And Related Equity Components Recorded In Capital In Excess Of Par Value Net Of Deferred Taxes Table [Text Block] | As of September 24, 2016 and September 26, 2015, the Convertible Notes and related equity components (recorded in additional paid-in-capital, net of deferred taxes) consisted of the following:
|  | 2016 |  | 2015
2010 Notes principal amount |  | $ | 12.3 |  |  | $ | 150.0 |
Unamortized discount and issuance costs (1) |  | (0.1 | ) |  | (8.2 | )
Net carrying amount |  | $ | 12.2 |  |  | $ | 141.8 |
Equity component, net of taxes |  | $ | 1.6 |  |  | $ | 20.0 |
2012 Notes principal amount |  | $ | 363.4 |  |  | $ | 500.0 |
Unamortized discount and issuance costs (1) |  | (9.5 | ) |  | (21.8 | )
Net carrying amount |  | $ | 353.9 |  |  | $ | 478.2 |
Equity component, net of taxes |  | $ | 35.8 |  |  | $ | 49.2 |
2013 Notes principal amount |  | $ | 370.0 |  |  | $ | 370.0 |
Principal accretion |  | 57.1 |  |  | 40.5 |
Unamortized discount and issuance costs (1) |  | (17.5 | ) |  | (29.9 | )
Net carrying amount |  | $ | 409.6 |  |  | $ | 380.6 |
Equity component, net of taxes |  | $ | 131.5 |  |  | $ | 131.5 |
(1) | In connection with the adoption of ASU 2015-03, debt issuance costs are presented as direct deduction from the debt liability consistent with the presentation of a debt discount.
Interest Expense under Convertible Notes | Interest expense under the Convertible Notes is as follows:
| Years Ended
| September 24, 2016 |  | September 26, 2015 |  | September 27, 2014
Amortization of debt discount | $ | 22.3 |  |  | $ | 34.9 |  |  | $ | 37.1 |
Amortization of deferred financing costs | 1.1 |  |  | 1.7 |  |  | 1.9 |
Principal accretion | 16.6 |  |  | 15.9 |  |  | 15.3 |
Non-cash interest expense | 40.0 |  |  | 52.5 |  |  | 54.3 |
2.00% accrued interest (cash) | 10.0 |  |  | 18.2 |  |  | 22.3 |
| $ | 50.0 |  |  | $ | 70.7 |  |  | $ | 76.6 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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