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Debt - Senior Credit Facilities (Details) - Revolving Credit Facility - Line of Credit - USD ($) | 1 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2020 | Dec. 31, 2020 | Sep. 30, 2019
Debt Instrument [Line Items] |  |  |
Maximum amount to finance Convertible Notes |  | $ 1,000,000,000.00 |
Maximum borrowing capacity |  | $ 3,570,000,000 | $ 3,600,000,000
Base Rate | Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on treasury rate | 0.00% |  |
Base Rate | Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on treasury rate | 0.75% |  |
LIBOR | Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on treasury rate | 1.00% |  |
LIBOR | Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on treasury rate | 1.75% |  |

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- Definition Line Of Credit Facility, Maximum Repurchase Of Convertible Debt With Secured Debt + References No definition available. + Details
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Namespace Prefix: | mchp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- 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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- 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 http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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