Name:	mscc_GoodwillAndIntangibleAssetsDisclosureLineItems
Namespace Prefix:	mscc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

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

- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

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

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount after accumulated impairment loss of an asset representing 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/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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

GOODWILL AND INTANGIBLE ASSETS, NET - Goodwill and Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified										12 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012	Sep. 28, 2014 Completed technology	Sep. 29, 2013 Completed technology	Sep. 28, 2014 Customer relationships	Sep. 29, 2013 Customer relationships	Sep. 28, 2014 Backlog, trade name and other	Sep. 29, 2013 Backlog, trade name and other	Sep. 28, 2014 Minimum Completed technology	Sep. 28, 2014 Minimum Customer relationships	Sep. 28, 2014 Minimum Backlog, trade name and other	Sep. 28, 2014 Maximum Completed technology	Sep. 28, 2014 Maximum Customer relationships	Sep. 28, 2014 Maximum Backlog, trade name and other
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Value	$ 722,377	$ 592,841		$ 402,670	$ 309,470	$ 301,790	$ 270,030	$ 17,917	$ 13,341
Accumulated Amortization	(370,484)	(277,666)		(201,337)	(157,472)	(152,462)	(107,474)	(16,685)	(12,720)
Life (years)										2 years	4 years	1 year	15 years	15 years	5 years
Goodwill	$ 885,610	$ 790,236	$ 790,236