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Sales of Receivables - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021	Dec. 31, 2021
Receivables [Abstract]
Servicing obligations for long-term receivables	$ 875		$ 875		$ 940
Long-term financing	102		102		$ 56
Contract-specific discounting facility	$ 0	$ 36	$ 49	$ 107

X

- Definition

The amount of outstanding commitments to provide long-term financing to third parties.

+ References

No definition available.

+ Details

Name:	msi_LongTermFinancing
Namespace Prefix:	msi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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

X

- Definition

Represents the amount of sold long-term receivables for which the entity has retained servicing obligations.

+ References

No definition available.

+ Details

Name:	msi_ServiceObligationForLongTermReceivables
Namespace Prefix:	msi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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