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Share-Based Compensation Plans - Schedule of Compensation Expense (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Apr. 02, 2022	Apr. 03, 2021
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in Operating earnings	$ 37	$ 29
Tax benefit	(8)	(6)
Share-based compensation expense, net of tax	$ 29	$ 23
Decrease in basic earnings per share (in USD per share)	$ (0.17)	$ (0.14)
Decrease in diluted earnings per share (in USD per share)	$ (0.17)	$ (0.13)
Costs of sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in Operating earnings	$ 6	$ 4
Selling, general and administrative expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in Operating earnings	21	17
Research and development expenditures
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in Operating earnings	$ 10	$ 8

X

- Definition

This element represents the increase (decrease) in basic earnings per share attributable to share-based compensation expense.

+ References

No definition available.

+ Details

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Namespace Prefix:	msi_
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Balance Type:	na
Period Type:	duration

X

- Definition

This element represents the increase (decrease) in diluted earnings per share attributable to share-based compensation expense.

+ References

No definition available.

+ Details

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X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

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-Publisher FASB
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-Topic 718
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-Section 50
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Period Type:	duration

X

- Definition

Amount, after tax, of expense for award under share-based payment arrangement.

+ References

No definition available.

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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.

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- Definition

Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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-Name Accounting Standards Codification
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