Loan Voluntary Prepayment Amount

No definition available.

Name:	mksi_LoanVoluntaryPrepaymentAmount
Namespace Prefix:	mksi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Loans issuance discount rate.

+ References

No definition available.

+ Details

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Namespace Prefix:	mksi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Prepayment premium percentage of aggregate principal amount.

+ References

No definition available.

+ Details

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Namespace Prefix:	mksi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482900/835-30-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B

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-Topic 470
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482925/835-30-45-2

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-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482949/835-30-55-8

+ Details

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

- Definition

Amount of increase (decrease) of the credit facility.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

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

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
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-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483399/855-10-50-2

+ Details

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Balance Type:	na
Period Type:	duration

- Details

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- Details

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

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=mksi_JpmorganChaseBankNAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=mksi_IncrementalUsdTrancheBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=mksi_IncrementalTrancheBLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=mksi_UsdTrancheAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events - Additional Information (Detail) € in Millions						12 Months Ended
	Feb. 13, 2024 USD ($)	Feb. 05, 2024 USD ($)	Jan. 22, 2024 USD ($)	Oct. 31, 2023 USD ($)	Dec. 12, 2022 USD ($)	Dec. 31, 2023	Feb. 12, 2024 USD ($)	Jan. 22, 2024 EUR (€)	Aug. 17, 2022 USD ($)
Subsequent Event [Member] \| Incremental Revolving Commitments [Member] \| JPMorgan Chase Bank, N.A [Member]
Subsequent Event [Line Items]
Borrowing capacity	$ 675,000,000						$ 500,000,000
Increased available borrowing capacity	$ 175,000,000
Incremental USD Tranche B Loans [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Aggregate principal amount			$ 490,000,000
Incremental Tranche B Loans [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Aggregate principal amount \| €								€ 250
Loans issuance discount rate			0.25%
USD Tranche A [Member]
Subsequent Event [Line Items]
Loan voluntary prepayment amount				$ 100,000,000	$ 100,000,000
Borrowing capacity									$ 1,000,000,000
USD Tranche A [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Aggregate principal amount			$ 744,000,000
USD Tranche B [Member]
Subsequent Event [Line Items]
Prepayment premium percentage of aggregate principal amount						1.00%
Borrowing capacity									$ 3,600,000,000
USD Tranche B [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Prepayment premium percentage of aggregate principal amount			1.00%
Loan voluntary prepayment amount		$ 50,000,000