XML 59 R50.htm IDEA: XBRL DOCUMENT v3.22.2.2

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Income Taxes - Additional Information [Line Items]
Discrete Benefit for Swiss Tax Reform		$ 14.5
Income Tax (Textual) [Abstract]
Effective tax rate	27.50%	27.00%

X

- Definition

Discrete Benefit for Swiss Tax Reform

+ References

No definition available.

+ Details

Name:	kmt_DiscreteBenefitforSwissTaxReform
Namespace Prefix:	kmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Income tax.

+ References

No definition available.

+ Details

Name:	kmt_IncomeTaxTextualAbstract
Namespace Prefix:	kmt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

[Line Items] for Income Taxes - Additional Information [Table]

+ References

No definition available.

+ Details

Name:	kmt_IncomeTaxesAdditionalInformationLineItems
Namespace Prefix:	kmt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319

+ Details

Name:	us-gaap_EffectiveIncomeTaxRateContinuingOperations
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration