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Borrowings and Credit Arrangements - Interest Expense Senior Notes (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Dec. 26, 2020 | Dec. 28, 2019 | Sep. 28, 2020
Line of Credit Facility [Line Items] |  |  |
Interest expense | $ 15.1 | $ 15.7 |
Senior Notes | 2028 Senior Notes |  |  |
Line of Credit Facility [Line Items] |  |  |
Stated interest rate | 4.625% |  |
Interest expense | $ 4.8 | 4.8 |
Senior Notes | 2025 Senior Notes |  |  |
Line of Credit Facility [Line Items] |  |  |
Stated interest rate | 4.375% |  |
Interest expense | $ 2.3 | 10.9 |
Senior Notes | 2029 Senior Notes |  |  |
Line of Credit Facility [Line Items] |  |  |
Stated interest rate | 3.25% |  | 3.25%
Interest expense | $ 8.0 | $ 0.0 |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Aggregate amount of interest expense on all borrowings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.7,8) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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