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DEBT - Components of Long-Term Debt (Details) - USD ($) $ in Millions	Jan. 02, 2021	Sep. 30, 2020	Dec. 28, 2019	Oct. 22, 2019	Dec. 15, 2016
Debt Instrument [Line Items]
Total debt	$ 2,177.2	$ 1,531.2	$ 2,074.5
Less current portions	188.0	66.4	93.8
Long-term debt	1,979.8	1,455.1	1,969.9
Credit Facilities | Revolving loans
Debt Instrument [Line Items]
Total debt	599.6	64.0	537.1
Credit Facilities | Term loans
Debt Instrument [Line Items]
Total debt	$ 700.0	$ 710.0	$ 750.0
Senior Notes | Senior Notes – 5.250%
Debt Instrument [Line Items]
Interest rate of debt (percentage)	5.25%	5.25%	5.25%		5.25%
Total debt	$ 250.0	$ 250.0	$ 250.0
Senior Notes | Senior Notes – 4.500%
Debt Instrument [Line Items]
Interest rate of debt (percentage)	4.50%	4.50%	4.50%	4.50%
Total debt	$ 450.0	$ 450.0	$ 450.0
Receivables facility
Debt Instrument [Line Items]
Total debt	136.0	20.0	39.0
Finance lease obligations
Debt Instrument [Line Items]
Total debt	34.8	36.1	36.9
Other
Debt Instrument [Line Items]
Total debt	6.8	1.1	11.5
Long-term debt
Debt Instrument [Line Items]
Less unamortized debt issuance costs	$ 9.4	$ 9.7	$ 10.8

X

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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