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Goodwill and Intangible Assets - Summary of Quantitative Assessment (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)
Goodwill [Line Items]
Goodwill Impairment	$ 1,626
Electronics [Member]
Goodwill [Line Items]
Goodwill Impairment	826
Remaining Goodwill	1,420
General Metal Finishing [Member]
Goodwill [Line Items]
Goodwill Impairment	428
Remaining Goodwill	307
Equipment Solutions [Member]
Goodwill [Line Items]
Goodwill Impairment	372
Remaining Goodwill	$ 100

X

- Definition

Reporting unit goodwill.

+ References

No definition available.

+ Details

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Namespace Prefix:	mksi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
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Balance Type:	debit
Period Type:	duration

X

- 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

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