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FAIR VALUE MEASUREMENTS - Summary of Fair Value of Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 30, 2023 | Sep. 30, 2023 | Dec. 31, 2022 | Aug. 13, 2021 | Mar. 17, 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 | $ 1.5 | $ 1.2 | $ 1.9 |  |  |  |
Carrying Amount | Fair value, inputs, level 1 | Fair Value, Measurements, Recurring | Investment securities in non-qualified retirement plan assets |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Other | 40.1 | 36.3 | 37.7 |  |  |  |
Carrying Amount | Fair value, inputs, level 3 | Fair Value, Measurements, Recurring | Convertible debt investments |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Other | 85.0 | 85.8 | 91.2 |  |  |  |
Carrying Amount | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Credit facilities | Revolving loans |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt instruments | 511.2 | 88.3 | 681.5 |  |  |  |
Carrying Amount | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Credit facilities | Term loans |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt instruments | 912.5 | 925.0 | 962.5 |  |  |  |
Carrying Amount | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 4.000% Senior Notes |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt instruments | 500.0 | 500.0 | 500.0 |  |  |  |
Carrying Amount | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 4.375% Senior Notes |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt instruments | 400.0 | 400.0 | 400.0 |  |  |  |
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 | 0.0 | 0.0 | 161.0 |  |  |  |
Carrying Amount | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Other debt |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt instruments | 2.5 | 0.4 | 3.8 |  |  |  |
Estimated Fair Value | Fair value, inputs, level 1 | Fair Value, Measurements, Recurring |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Cash equivalents | 1.5 | 1.2 | 1.9 |  |  |  |
Estimated Fair Value | Fair value, inputs, level 1 | Fair Value, Measurements, Recurring | Investment securities in non-qualified retirement plan assets |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Other | 40.1 | 36.3 | 37.7 |  |  |  |
Estimated Fair Value | Fair value, inputs, level 3 | Fair Value, Measurements, Recurring | Convertible debt investments |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Other | 85.0 | 85.8 | 91.2 |  |  |  |
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Credit facilities | Revolving loans |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt instruments | 511.2 | 88.3 | 681.5 |  |  |  |
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Credit facilities | Term loans |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt instruments | 912.5 | 925.0 | 962.5 |  |  |  |
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 4.000% Senior Notes |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt instruments | 425.0 | 380.0 | 375.6 |  |  |  |
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 4.375% Senior Notes |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt instruments | 339.0 | 304.0 | 303.0 |  |  |  |
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 4.500% Senior Notes |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt instruments | 401.6 | 366.8 | 364.5 |  |  |  |
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Senior notes | 5.250% Senior Notes |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt instruments | 242.2 | 233.1 | 236.3 |  |  |  |
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Receivables facility |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt instruments | 0.0 | 0.0 | 161.0 |  |  |  |
Estimated Fair Value | Fair value, inputs, level 2 | Fair Value, Measurements, Recurring | Other debt |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt instruments | $ 2.5 | $ 0.4 | $ 3.8 |  |  |  |

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