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Leases - Narrative (Details) $ in Millions | 3 Months Ended
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Apr. 02, 2022 USD ($)
TETRA Ireland |
Lessee, Lease, Description [Line Items] |
Additional leases acquired | $ 34

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- Definition Lessee, Operating Lease, Additional Leases Acquired + References No definition available. + Details
Name: | msi_LesseeOperatingLeaseAdditionalLeasesAcquired
Namespace Prefix: | msi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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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
Name: | us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=msi_TETRAIrelandCommunicationsLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |