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DEBT - Senior Notes - 6.000% (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Oct. 23, 2019 | Dec. 28, 2019 | Apr. 03, 2021 | Mar. 28, 2020 | Oct. 13, 2015
Debt Instrument [Line Items] |  |  |  |  |
Repayments of Senior Notes |  |  | $ 0.0 | $ 400.0 |
6.000% Senior Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of Senior Notes | $ 412.5 |  |  |  |
Repayments of senior debt, accrued and unpaid interest | 0.5 |  |  |  |
Repayments of senior debt, redemption premium | 12.0 |  |  |  |
Repayments of senior debt, outstanding principal | $ 400.0 |  |  |  |
Senior notes | 6.000% Senior Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate of debt (percentage) |  |  | 6.00% | 6.00% | 6.00%
Write-off of unamortized bond issuance costs |  | $ 3.1 |  |  |

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