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FAIR VALUE MEASUREMENTS - Summary of Fair Value of Assets and Liabilities (Details) - USD ($) $ in Millions	Jan. 01, 2022	Sep. 30, 2021	Aug. 13, 2021	Mar. 17, 2021	Jan. 02, 2021	Oct. 22, 2019	Dec. 15, 2016
Senior notes | 4.000% Senior Notes
Liabilities
Interest rate of debt (percentage)	4.00%	4.00%		4.00%	4.00%
Senior notes | 4.375% Senior Notes
Liabilities
Interest rate of debt (percentage)	4.375%	4.375%	4.375%		4.375%
Senior notes | 4.500% Senior Notes
Liabilities
Interest rate of debt (percentage)	4.50%	4.50%			4.50%	4.50%
Senior notes | 5.250% Senior Notes
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	$ 1.6	$ 222.5			$ 3.3
Carrying Amount | Fair value, inputs, level 1 | Fair Value, Measurements, Recurring | Investment securities in non-qualified retirement plan assets
Assets
Other	50.1	45.0			38.7
Carrying Amount | Fair value, inputs, level 3 | Fair Value, Measurements, Recurring | Convertible debt investments
Assets
Other	191.3	190.3			0.0
Carrying Amount | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Credit facilities | Revolving loans
Liabilities
Debt instruments	856.5	0.0			599.6
Carrying Amount | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Credit facilities | Term loans
Liabilities
Debt instruments	660.0	670.0			700.0
Carrying Amount | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 4.000% Senior Notes
Liabilities
Debt instruments	500.0	500.0			0.0
Carrying Amount | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 4.375% Senior Notes
Liabilities
Debt instruments	400.0	400.0			0.0
Carrying Amount | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 4.500% Senior Notes
Liabilities
Debt instruments	450.0	450.0			450.0
Carrying Amount | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 5.250% Senior Notes
Liabilities
Debt instruments	250.0	250.0			250.0
Carrying Amount | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Receivables facility
Liabilities
Debt instruments	94.0	0.0			136.0
Carrying Amount | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Other debt
Liabilities
Debt instruments	20.6	11.9			6.8
Estimated Fair Value | Fair value, inputs, level 1 | Fair Value, Measurements, Recurring
Assets
Cash equivalents	1.6	222.5			3.3
Estimated Fair Value | Fair value, inputs, level 1 | Fair Value, Measurements, Recurring | Investment securities in non-qualified retirement plan assets
Assets
Other	50.1	45.0			38.7
Estimated Fair Value | Fair value, inputs, level 3 | Fair Value, Measurements, Recurring | Convertible debt investments
Assets
Other	191.3	190.3			0.0
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Credit facilities | Revolving loans
Liabilities
Debt instruments	856.5	0.0			599.6
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Credit facilities | Term loans
Liabilities
Debt instruments	660.0	670.0			700.0
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 4.000% Senior Notes
Liabilities
Debt instruments	495.0	498.8			0.0
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 4.375% Senior Notes
Liabilities
Debt instruments	399.0	402.0			0.0
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 4.500% Senior Notes
Liabilities
Debt instruments	468.6	466.9			484.9
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 5.250% Senior Notes
Liabilities
Debt instruments	256.6	258.1			263.4
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Receivables facility
Liabilities
Debt instruments	94.0	0.0			136.0
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Other debt
Liabilities
Debt instruments	$ 20.6	$ 11.9			$ 6.8

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