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FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions	Jan. 02, 2021	Sep. 30, 2020	Dec. 28, 2019	Dec. 15, 2016
Senior notes | Senior Notes – 4.500%
Liabilities:
Interest rate of debt (percentage)	4.50%	4.50%	4.50%
Senior notes | Senior Notes – 5.250%
Liabilities:
Interest rate of debt (percentage)	5.25%	5.25%	5.25%	5.25%
CARRYING AMOUNT | Fair value, inputs, level 1 | Fair Value, Measurements, Recurring
Assets:
Cash equivalents	$ 3.3	$ 2.4	$ 2.4
CARRYING AMOUNT | Fair value, inputs, level 1 | Fair Value, Measurements, Recurring | Investment securities in non-qualified retirement plan assets
Assets:
Other	38.7	29.8	25.2
CARRYING AMOUNT | Fair value, inputs, level 3 | Fair Value, Measurements, Recurring | Bonnie Option
Assets:
Other	0.0	23.3	11.3
CARRYING AMOUNT | Fair value, inputs, level 2 | Credit facilities | Revolving loans
Liabilities:
Debt instruments	599.6	64.0	537.1
CARRYING AMOUNT | Fair value, inputs, level 2 | Credit facilities | Term loans
Liabilities:
Debt instruments	700.0	710.0	750.0
CARRYING AMOUNT | Fair value, inputs, level 2 | Senior notes | Senior Notes – 4.500%
Liabilities:
Debt instruments	450.0	450.0	450.0
CARRYING AMOUNT | Fair value, inputs, level 2 | Senior notes | Senior Notes – 5.250%
Liabilities:
Debt instruments	250.0	250.0	250.0
CARRYING AMOUNT | Fair value, inputs, level 2 | Receivables facility
Liabilities:
Debt instruments	136.0	20.0	39.0
CARRYING AMOUNT | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Other debt
Liabilities:
Debt instruments	6.8	1.1	11.5
ESTIMATED FAIR VALUE | Fair value, inputs, level 1 | Fair Value, Measurements, Recurring
Assets:
Cash equivalents	3.3	2.4	2.4
ESTIMATED FAIR VALUE | Fair value, inputs, level 1 | Fair Value, Measurements, Recurring | Investment securities in non-qualified retirement plan assets
Assets:
Other	38.7	29.8	25.2
ESTIMATED FAIR VALUE | Fair value, inputs, level 3 | Fair Value, Measurements, Recurring | Bonnie Option
Assets:
Other	0.0	23.3	11.3
ESTIMATED FAIR VALUE | Fair value, inputs, level 2 | Credit facilities | Revolving loans
Liabilities:
Debt instruments	599.6	64.0	537.1
ESTIMATED FAIR VALUE | Fair value, inputs, level 2 | Credit facilities | Term loans
Liabilities:
Debt instruments	700.0	710.0	750.0
ESTIMATED FAIR VALUE | Fair value, inputs, level 2 | Senior notes | Senior Notes – 4.500%
Liabilities:
Debt instruments	484.9	476.4	459.6
ESTIMATED FAIR VALUE | Fair value, inputs, level 2 | Senior notes | Senior Notes – 5.250%
Liabilities:
Debt instruments	263.4	266.6	267.5
ESTIMATED FAIR VALUE | Fair value, inputs, level 2 | Receivables facility
Liabilities:
Debt instruments	136.0	20.0	39.0
ESTIMATED FAIR VALUE | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Other debt
Liabilities:
Debt instruments	$ 6.8	$ 1.1	$ 11.5

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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

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