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Risk Management - Foreign Currency Risk (Details) $ in Millions	Sep. 30, 2023 USD ($) position	Dec. 31, 2022 USD ($) position
Derivative [Line Items]
Number of net notional positions to buy or sell foreign currency disclosed (in number of positions) | position	5	5
Foreign Exchange Contract
Derivative [Line Items]
Notional amounts of outstanding foreign exchange contracts	$ 1,300	$ 1,100
Foreign Exchange Contract | British pound | Long
Derivative [Line Items]
Notional amounts of outstanding foreign exchange contracts	262	290
Foreign Exchange Contract | Euro | Long
Derivative [Line Items]
Notional amounts of outstanding foreign exchange contracts	250	185
Foreign Exchange Contract | Australian dollar | Short
Derivative [Line Items]
Notional amounts of outstanding foreign exchange contracts	124	130
Foreign Exchange Contract | Canadian dollar | Short
Derivative [Line Items]
Notional amounts of outstanding foreign exchange contracts	75	0
Foreign Exchange Contract | Chinese renminbi | Short
Derivative [Line Items]
Notional amounts of outstanding foreign exchange contracts	$ 68	$ 61

X

- Definition

This element represents the number of the largest net notional amounts of positions to buy or sell foreign currency which is disclosed in the footnotes.

+ References

No definition available.

+ Details

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Namespace Prefix:	msi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480237/815-40-50-5

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X

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A

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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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