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Borrowings and Credit Arrangements - Interest Expense Senior Notes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 28, 2020 | Mar. 30, 2019 | Mar. 28, 2020 | Mar. 30, 2019 | Jan. 19, 2018
Line of Credit Facility [Line Items] |  |  |  |  |
Interest expense | $ 15.7 | $ 15.7 | $ 31.4 | $ 31.4 |
2025 Senior Notes |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Stated interest rate | 4.375% |  | 4.375% |  |
Senior Notes | 2028 Senior Notes |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Stated interest rate | 4.625% |  | 4.625% |  | 4.625%
Interest expense | $ 4.8 | 4.8 | $ 9.6 | 9.6 |
Senior Notes | 2025 Senior Notes |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Stated interest rate | 4.375% |  | 4.375% |  |
Interest expense | $ 10.9 | $ 10.9 | $ 21.8 | $ 21.8 |

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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=6877327&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=116637391&loc=SL114874048-224260 + Details
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