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FAIR VALUE MEASUREMENTS (Tables) | 12 Months Ended
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Sep. 30, 2023
Fair Value Disclosures [Abstract] |
Fair Value Measurements, Recurring Basis | The following table summarizes the fair value of the Company’s assets and liabilities for which disclosure of fair value is required:
|  |  |  |  | 2023 |  | 2022
|  |  | Fair Value Hierarchy Level |  | Carrying Amount |  | Estimated Fair Value |  | Carrying Amount |  | Estimated Fair Value
Assets |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  |  | Level 1 |  | $ | 1.2 |  |  | $ | 1.2 |  |  | $ | 64.3 |  |  | $ | 64.3 |
Other |  |  |  |  |  |  |  |  |  |  |
Investment securities in non-qualified retirement plan assets |  |  | Level 1 |  | 36.3 |  |  | 36.3 |  |  | 38.4 |  |  | 38.4 |
Loans receivable |  |  | Level 3 |  | — |  |  | — |  |  | 32.8 |  |  | 32.8 |
Convertible debt investments |  |  | Level 3 |  | 85.8 |  |  | 85.8 |  |  | 117.0 |  |  | 117.0 |
Liabilities |  |  |  |  |  |  |  |  |  |  |
Debt instruments |  |  |  |  |  |  |  |  |  |  |
Credit facilities – revolving loans |  |  | Level 2 |  | 88.3 |  |  | 88.3 |  |  | 300.5 |  |  | 300.5 |
Credit facilities – term loans |  |  | Level 2 |  | 925.0 |  |  | 925.0 |  |  | 975.0 |  |  | 975.0 |
Senior Notes due 2031 – 4.000% |  |  | Level 2 |  | 500.0 |  |  | 380.0 |  |  | 500.0 |  |  | 350.6 |
Senior Notes due 2032 – 4.375% |  |  | Level 2 |  | 400.0 |  |  | 304.0 |  |  | 400.0 |  |  | 284.0 |
Senior Notes due 2029 – 4.500% |  |  | Level 2 |  | 450.0 |  |  | 366.8 |  |  | 450.0 |  |  | 325.7 |
Senior Notes due 2026 – 5.250% |  |  | Level 2 |  | 250.0 |  |  | 233.1 |  |  | 250.0 |  |  | 230.0 |
Receivables facility |  |  | Level 2 |  | — |  |  | — |  |  | 75.0 |  |  | 75.0 |
Other debt |  |  | Level 2 |  | 0.4 |  |  | 0.4 |  |  | 12.7 |  |  | 12.7 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation | Changes in the balance of Level 3 convertible debt investments carried at fair value are presented below. There were no transfers into or out of Level 3.
| Year Ended September 30,
| 2023 |  | 2022
Fair value at beginning of year | $ | 117.0 |  |  | $ | 190.3 |
Purchases | — |  |  | 25.0 |
Total realized / unrealized gains (losses) included in net earnings | (97.6) |  |  | 3.7 |
Total realized / unrealized gains (losses) included in OCI | 66.4 |  |  | (102.0) |
Fair value at end of year | $ | 85.8 |  |  | $ | 117.0 |
Debt Securities, Available-for-Sale, Allowance for Credit Loss | A progression of the allowance for expected credit losses on convertible debt investments is shown below:
| Year Ended September 30, 2023
Balance at beginning of year | $ | — |
Provision for expected credit losses on securities with no previous allowance | 101.3 |
Balance at end of year | $ | 101.3 |

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2C -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2C Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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