Leases - Schedule of Non-Cancelable Operating Lease Maturities (Details) $ in Millions	Jun. 30, 2019 USD ($)
Leases [Abstract]
2020	$ 49.0
2021	38.2
2022	30.3
2023	18.0
2024	9.1
Thereafter	22.6
Total lease liabilities	$ 167.2

Lessee, Non-Cancelable Operating Lease, Liability, Payments, Due Year Five

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Lessee, Non-Cancelable Operating Lease, Liability, Payments, Due Year Four

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Lessee, Non-Cancelable Operating Lease, Liability, Payments, Due Year Three

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Lessee, Non-Cancelable Operating Lease, Liability, Payments, Due Year Two

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Lessee, Non-Cancelable Operating Lease, Liability, Payments, Due after Year Five

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Lessee, Non-Cancelable Operating Lease, Liability, Payments, Remainder of Fiscal Year

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Non-Cancelable Operating Lease, Liability

No definition available.

Name:	mchp_NonCancelableOperatingLeaseLiability
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Period Type:	instant

No definition available.