XML 61 R52.htm IDEA: XBRL DOCUMENT
v3.22.1

Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021
Income Taxes - Additional Information [Line Items] |  |  |  |
Discrete Benefit for Swiss Tax Reform |  |  |  | $ 14.5
NOL, tax credit and other carryforward | $ 56.0 |  | $ 56.0 |
Deferred Tax Assets, Net | $ 25.2 |  | $ 25.2 |
Income Tax (Textual) [Abstract] |  |  |  |
Effective tax rate | 28.30% | (8.00%) | 27.20% | (84.60%)

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 NOL, tax credit and other carryforward + References No definition available. + Details
Name: | kmt_NOLTaxCreditAndOtherCarryforward
Namespace Prefix: | kmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxAssetsLiabilitiesNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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 http://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