No definition available.

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- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

No definition available.

+ Details

Name:	us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: 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 https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_LiabilitiesFairValueDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of other assets.

+ References

No definition available.

+ Details

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FAIR VALUE MEASUREMENTS - Summary of Fair Value of Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2022	Sep. 30, 2021	Aug. 13, 2021	Mar. 17, 2021	Sep. 30, 2020	Oct. 22, 2019	Dec. 15, 2016
Senior Notes \| Senior Notes due 2031 – 4.000%
Liabilities
Interest rate (percent)	4.00%	4.00%		4.00%
Senior Notes \| Senior Notes due 2032 – 4.375%
Liabilities
Interest rate (percent)	4.375%	4.375%	4.375%
Senior Notes \| Senior Notes - 4.500%
Liabilities
Interest rate (percent)	4.50%	4.50%				4.50%
Senior Notes \| Senior Notes due 2026 – 5.250%
Liabilities
Interest rate (percent)	5.25%	5.25%					5.25%
Reported Value Measurement \| Fair value, inputs, level 2 \| Senior Notes \| Senior Notes due 2031 – 4.000%
Liabilities
Long-term debt	$ 500.0	$ 500.0
Reported Value Measurement \| Fair value, inputs, level 2 \| Senior Notes \| Senior Notes due 2032 – 4.375%
Liabilities
Long-term debt	400.0	400.0
Reported Value Measurement \| Fair value, inputs, level 2 \| Senior Notes \| Senior Notes - 4.500%
Liabilities
Long-term debt	450.0	450.0
Reported Value Measurement \| Fair value, inputs, level 2 \| Senior Notes \| Senior Notes due 2026 – 5.250%
Liabilities
Long-term debt	250.0	250.0
Reported Value Measurement \| Fair value, inputs, level 2 \| Receivables facility
Liabilities
Long-term debt	75.0	0.0
Reported Value Measurement \| Fair value, inputs, level 2 \| Credit Facilities \| Revolving loans
Liabilities
Long-term debt	300.5	0.0
Reported Value Measurement \| Fair value, inputs, level 2 \| Credit Facilities \| Term loans
Liabilities
Long-term debt	975.0	670.0
Estimate of Fair Value Measurement \| Fair value, inputs, level 2 \| Senior Notes \| Senior Notes due 2031 – 4.000%
Liabilities
Long-term debt	350.6	498.8
Estimate of Fair Value Measurement \| Fair value, inputs, level 2 \| Senior Notes \| Senior Notes due 2032 – 4.375%
Liabilities
Long-term debt	284.0	402.0
Estimate of Fair Value Measurement \| Fair value, inputs, level 2 \| Senior Notes \| Senior Notes - 4.500%
Liabilities
Long-term debt	325.7	466.9
Estimate of Fair Value Measurement \| Fair value, inputs, level 2 \| Senior Notes \| Senior Notes due 2026 – 5.250%
Liabilities
Long-term debt	230.0	258.1
Estimate of Fair Value Measurement \| Fair value, inputs, level 2 \| Receivables facility
Liabilities
Long-term debt	75.0	0.0
Estimate of Fair Value Measurement \| Fair value, inputs, level 2 \| Credit Facilities \| Revolving loans
Liabilities
Long-term debt	300.5	0.0
Estimate of Fair Value Measurement \| Fair value, inputs, level 2 \| Credit Facilities \| Term loans
Liabilities
Long-term debt	975.0	670.0
Fair Value, Measurements, Recurring \| Reported Value Measurement \| Fair value, inputs, level 1
Assets
Cash equivalents	64.3	222.5
Fair Value, Measurements, Recurring \| Reported Value Measurement \| Fair value, inputs, level 1 \| Investment securities in non-qualified retirement plan assets
Assets
Other	38.4	45.0
Fair Value, Measurements, Recurring \| Reported Value Measurement \| Fair value, inputs, level 2 \| Other Long-term Debt
Liabilities
Long-term debt	12.7	11.9
Fair Value, Measurements, Recurring \| Reported Value Measurement \| Fair value, inputs, level 3 \| Convertible debt investments
Assets
Convertible debt investments	117.0	190.3
Fair Value, Measurements, Recurring \| Reported Value Measurement \| Fair value, inputs, level 3 \| Loans receivable
Assets
Other	32.8	35.8
Fair Value, Measurements, Recurring \| Estimate of Fair Value Measurement \| Fair value, inputs, level 1
Assets
Cash equivalents	64.3	222.5
Fair Value, Measurements, Recurring \| Estimate of Fair Value Measurement \| Fair value, inputs, level 1 \| Investment securities in non-qualified retirement plan assets
Assets
Other	38.4	45.0
Fair Value, Measurements, Recurring \| Estimate of Fair Value Measurement \| Fair value, inputs, level 2 \| Other Long-term Debt
Liabilities
Long-term debt	12.7	11.9
Fair Value, Measurements, Recurring \| Estimate of Fair Value Measurement \| Fair value, inputs, level 3 \| Convertible debt investments
Assets
Convertible debt investments	117.0	190.3			$ 0.0
Fair Value, Measurements, Recurring \| Estimate of Fair Value Measurement \| Fair value, inputs, level 3 \| Loans receivable
Assets
Other	$ 32.8	$ 35.8