Amount of amortization expense attributable to debt issuance costs.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(8))
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1F
-Subparagraph (b)(2)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399

+ Details

Name:	us-gaap_AmortizationOfFinancingCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1D
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=iivi_NewSeniorCreditFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=iivi_A500SeniorNotesDueDecember2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=iivi_NewTermLoanACreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=iivi_TermAFacilityAndRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=iivi_NewTermLoanBCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=iivi_NewTermLoanBCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt - Senior Credit Facility (Details) - USD ($)			3 Months Ended	9 Months Ended
Debt - Senior Credit Facility (Details) - USD ($)	Mar. 31, 2023	Jul. 01, 2022	Mar. 31, 2023	Mar. 31, 2023	Dec. 10, 2021
Line of Credit Facility [Line Items]
Debt issuance costs capitalized	$ 90,000,000		$ 90,000,000	$ 90,000,000
Senior Credit Facilities
Line of Credit Facility [Line Items]
Aggregate principal amount		$ 4,000,000,000
Amortization of debt issuance costs			$ 5,000,000	$ 14,000,000
5.000% Senior Notes
Line of Credit Facility [Line Items]
Debt instrument, interest rate	5.00%		5.00%	5.00%	5.00%
New Term Loan A Credit Facility
Line of Credit Facility [Line Items]
Aggregate principal amount		$ 850,000,000
New Term Loan A Credit Facility \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate				1.75%
New Term Loan A Credit Facility \| Term A Facility and Revolving Credit Facility \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate	0.10%
New Term Loan A Credit Facility \| Term A Facility and Revolving Credit Facility \| SOFR \| Minimum
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		1.75%
New Term Loan A Credit Facility \| Term A Facility and Revolving Credit Facility \| SOFR \| Maximum
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		2.50%
New Term Loan B Credit Facility
Line of Credit Facility [Line Items]
Aggregate principal amount		$ 2,800,000,000
New Term Loan B Credit Facility \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		2.75%		2.75%
New Term Loan B Credit Facility \| New Term Loan B Credit Facility
Line of Credit Facility [Line Items]
Amortization of debt issuance costs			$ 69,000,000	$ 183,000,000
New Term Loan B Credit Facility \| New Term Loan B Credit Facility \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		0.50%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Aggregate principal amount		$ 350,000,000
Revolving Credit Facility \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate				1.75%
Revolving Credit Facility \| Term A Facility and Revolving Credit Facility \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate	0.10%
Revolving Credit Facility \| Term A Facility and Revolving Credit Facility \| SOFR \| Minimum
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		1.75%
Revolving Credit Facility \| Term A Facility and Revolving Credit Facility \| SOFR \| Maximum
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		2.50%
Letter of Credit
Line of Credit Facility [Line Items]
Aggregate principal amount		$ 50,000,000