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Schedule II: Valuation and Qualifying Accounts (Details) - Allowance for Doubtful Accounts - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Changes in valuation and qualifying accounts
Balance at Beginning of Year	$ 92.8	$ 77.9	$ 56.5
Additions Charged to Cost of Revenue	43.9	29.1	37.6
Deductions	(29.6)	(14.9)	(16.4)
Other and Foreign Exchange Impact	(3.1)	0.7	0.2
Balance at the End of the Year	$ 104.0	$ 92.8	$ 77.9

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- Definition

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No definition available.

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- Definition

Amount of increase (decrease) in valuation and qualifying accounts and reserves from adjustment.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
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- Definition

Amount of valuation and qualifying accounts and reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.12-09(Column B))
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
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