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Debt - Senior Credit Facilities (Details) - Line of Credit - USD ($) $ in Millions	1 Months Ended
	Dec. 31, 2021	Mar. 31, 2022
Debt Instrument [Line Items]
Incremental borrowing capacity		$ 750.0
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 2,750.0
Revolving Credit Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.125%
Revolving Credit Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Revolving Credit Facility | Daily Simple SOFR Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.125%
Revolving Credit Facility | Daily Simple SOFR Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Revolving Credit Facility | EURIBOR | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.125%
Revolving Credit Facility | EURIBOR | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Revolving Credit Facility | Federal Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Revolving Credit Facility | Adjusted Term SOFR Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%

X

- Definition

Line of Credit Facility, Incremental Borrowing Capacity

+ References

No definition available.

+ Details

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Namespace Prefix:	mchp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- 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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Namespace Prefix:	us-gaap_
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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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- 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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X

- 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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