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Income Taxes Rate Reconciliation (Tables)

6 Months Ended

Mar. 31, 2025

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The reconciliation between the U.S. federal statutory income tax rate and the effective income tax rate is presented below:

			Three months ended												Six months ended
			March 31,												March 31,
			2025						2024						2025						2024
U.S. federal statutory income tax rate			21.0		%				21.0		%				21.0		%				21.0		%
Adjustments to reconcile to the effective tax rate:
State income taxes, net of federal benefit			3.9						3.4						3.9						3.4
Excess tax (benefit) deficit related to stock-based compensation			(1.0)						—						(2.0)						0.1
Tax credits			(1.6)						(2.1)						(1.6)						(2.1)
Global Intangible Low-Taxed Income			0.3						0.2						0.3						0.2
Foreign income tax rate differential			(0.4)						(0.8)						(0.4)						(0.8)
Nondeductible compensation			1.4						1.0						1.4						1.0
Uncertain tax positions			0.3						0.5						0.5						(1.6)
Valuation allowances			—						—						0.1						—
Other			0.3						1.6						0.5						1.5
Effective income tax rate			24.2		%				24.8		%				23.7		%				22.7		%

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- References

No definition available.

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- Definition

Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

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