Other Financial Data - Other Charges (Income) (Details) - USD ($) $ in Millions			3 Months Ended	9 Months Ended
Dec. 22, 2022	Feb. 11, 2022	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Intangibles amortization			$ 39	$ 63	$ 137	$ 194
Environmental reserve expense			0	0	15	0
Reorganization of business			4	2	16	14
Operating lease asset impairments			0	4	4	16
Acquisition-related transaction fees			1	2	3	16
Fixed asset impairments			0	1	3	12
Other			1	(1)	2	0
Other charges			46	83	181	262
Settlements Other Than Hytera
Accumulated Other Comprehensive Income (Loss) [Line Items]
Legal settlements			1	12	1	23
Hytera Legal Settlement
Accumulated Other Comprehensive Income (Loss) [Line Items]
Legal settlements	$ (2)	$ (13)	$ 0	$ 0	$ 0	$ (13)

Other Cost and Expense, Operating, Other

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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.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount, after recovery, of expense for known and estimated future costs arising from requirement to perform environmental remediation.

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Amount of loss from impairment of right-of-use asset from operating lease.

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The net amount of other operating income and expenses, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operations.

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Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation.

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The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

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