XML 60 R49.htm IDEA: XBRL DOCUMENT
v3.20.2

Intangible Assets and Goodwill - Goodwill by Reporting Segment (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2020 USD ($) unit | Sep. 30, 2020 USD ($)
Goodwill By Reporting Segment [Line Items] |  |
Goodwill | $ 6,664.8 | $ 6,664.8
Number of reporting units | unit | 2 |
Semiconductor Products Reporting Unit |  |
Goodwill By Reporting Segment [Line Items] |  |
Goodwill |  | 6,645.6
Technology Licensing Reporting Unit |  |
Goodwill By Reporting Segment [Line Items] |  |
Goodwill |  | $ 19.2

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment. + References No definition available. + Details
Name: | us-gaap_NumberOfReportingUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
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
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ReportingUnitAxis=mchp_SemiconductorProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReportingUnitAxis=mchp_TechnologyLicensingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |