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Long-term Financing and Sales of Receivables - Proceeds Received from Non-Recourse Sales of Accounts Receivable and Long-Term Receivables (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Receivables [Abstract] |  |  |
Contract-specific discounting facility | $ 0 | $ 0 | $ 49
Accounts receivable sales proceeds | 15 | 96 | 179
Long-term receivables sales proceeds | 205 | 182 | 204
Total proceeds from receivable sales | $ 220 | $ 278 | $ 432

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- Definition Accounts Receivable Sales Proceeds + References No definition available. + Details
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Namespace Prefix: | msi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Long Term Receivables Sales Proceeds + References No definition available. + Details
Name: | msi_LongTermReceivablesSalesProceeds
Namespace Prefix: | msi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Receivable Discounting Facility Sales Proceeds + References No definition available. + Details
Name: | msi_ReceivableDiscountingFacilitySalesProceeds
Namespace Prefix: | msi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The cash inflow associated with the proceeds from sale and collection of receivables during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 + Details
Name: | us-gaap_ProceedsFromSaleAndCollectionOfReceivables
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration