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Goodwill and Intangibles - Schedule of Acquired Intangibles in Accompanying Consolidated Balance Sheets (Details) $ in Thousands	9 Months Ended
	Jun. 30, 2023 USD ($)
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	$ 1,394,052
Amortization	(152,232)
Acquired	5,537
Post-Acquisition Adjustments	(1,409)
Foreign currency translation and other	108,729
Ending balance	1,354,677
Customer Relationships, Contracts and Backlog
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	1,136,438
Amortization	(132,772)
Acquired	5,537
Post-Acquisition Adjustments	(1,409)
Foreign currency translation and other	83,415
Ending balance	1,091,209
Developed Technology
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	88,931
Amortization	(11,720)
Acquired	0
Post-Acquisition Adjustments	0
Foreign currency translation and other	1,785
Ending balance	78,996
Trade Names
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	168,683
Amortization	(7,740)
Acquired	0
Post-Acquisition Adjustments	0
Foreign currency translation and other	23,529
Ending balance	$ 184,472

X

- Definition

Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Finite-Lived Intangibles

+ References

No definition available.

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 350
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-Section 45
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-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482665/350-30-50-2

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

No definition available.

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483154/926-20-50-5

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-URI https://asc.fasb.org//1943274/2147482665/350-30-50-2

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 30
-Name Accounting Standards Codification
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-Paragraph 1
-Subparagraph (a)(1)
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-URI https://asc.fasb.org//1943274/2147482665/350-30-50-1

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