XML 95 R64.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Accrued Expenses and Other Current Liabilities, and Deferred Income Taxes and Other Long-Term Liabilities - Schedule of Deferred Income Taxes and Other Liabilities Noncurrent (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Jun. 30, 2021 | Jun. 30, 2020
--- | --- | --- | ---
Accrued Expenses and Other Current Liabilities, and Deferred Income Taxes and Other Long-Term Liabilities [Abstract] |  |  |
Deferred income taxes | $ 161.0 | $ 40.1 | $ 33.1
Pension and other post-retirement obligations, non-current | 11.7 | 12.5 | 12.4
Other long-term liabilities | 24.7 | 24.9 | 18.0
Total deferred income taxes and other long-term liabilities | $ 197.4 | $ 77.5 | $ 63.5

X
- Definition Accrued Expenses and Other Current Liabilities, and Deferred Income Taxes and Other Long-Term Liabilities [Abstract] + References No definition available. + Details
Name: | mir_AccruedExpensesAndOtherCurrentLiabilitiesAndDeferredIncomeTaxesAndOtherLongTermLiabilitiesAbstract
Namespace Prefix: | mir_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Deferred income taxes noncurrent. + References No definition available. + Details
Name: | mir_DeferredIncomeTaxesNoncurrent
Namespace Prefix: | mir_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of deferred tax liability attributable to taxable temporary differences, after deferred tax asset, and other liabilities expected to be paid after one year or operating cycle, if longer. + References No definition available. + Details
Name: | us-gaap_DeferredIncomeTaxesAndOtherLiabilitiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_OtherLiabilitiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of liability, recognized in statement of financial position, for pension, other postretirement and postemployment benefits, classified as noncurrent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123453770&loc=d3e1703-114919 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123453770&loc=d3e1731-114919 + Details
Name: | us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant