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Debt and Credit Facilities (Details) - USD ($)		3 Months Ended		9 Months Ended
Debt and Credit Facilities (Details) - USD ($)	Mar. 25, 2024	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023	Feb. 14, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Long term debt		$ 5,997,000,000		$ 5,997,000,000			$ 6,019,000,000
Loss from the extinguishment of Silver Lake convertible		0	$ 0	585,000,000	$ 0
1.75% Senior Convertible Notes Due in 2024
Debt Instrument [Line Items]
Debt instrument, repurchase amount		593,000,000		593,000,000
Loss from the extinguishment of Silver Lake convertible				585,000,000
Accrued interest		8,000,000		8,000,000
Commercial Paper
Debt Instrument [Line Items]
Long term debt		0		0
Line of credit facility borrowing capacity		2,200,000,000		2,200,000,000
Line of Credit \| Revolving Credit Facility \| 2021 Motorola Solutions Credit Agreement
Debt Instrument [Line Items]
Line of credit facility borrowing capacity		2,250,000,000		2,250,000,000
Line of Credit \| Letter of Credit \| 2021 Motorola Solutions Credit Agreement
Debt Instrument [Line Items]
Line of credit facility borrowing capacity		450,000,000		$ 450,000,000
Senior Notes \| 4.0% senior notes due 2024
Debt Instrument [Line Items]
Repayments of debt		$ 313,000,000
Interest rate		4.00%		4.00%
Long term debt		$ 0		$ 0			313,000,000
Senior Notes \| 5.0% senior notes due 2029
Debt Instrument [Line Items]
Interest rate	5.00%	5.00%		5.00%
Long term debt		$ 396,000,000		$ 396,000,000			0
Debt instrument face amount	$ 400,000,000
Senior Notes \| 5.4% senior notes due 2034
Debt Instrument [Line Items]
Interest rate	5.40%	5.40%		5.40%
Long term debt		$ 892,000,000		$ 892,000,000			0
Debt instrument face amount	$ 900,000,000	$ 900,000,000		$ 900,000,000
Senior Notes \| 5.0 % Senior Notes Due 2029 and 5.4% Senior Notes Due 2034
Debt Instrument [Line Items]
Debt instrument net of issuance costs	1,300,000,000
Convertible notes \| 1.75% Senior Convertible Notes Due in 2024
Debt Instrument [Line Items]
Interest rate		1.75%		1.75%
Long term debt		$ 0		$ 0			1,000,000,000
Debt instrument, repurchased principal amount	$ 1,000,000,000	$ 1,000,000,000		$ 1,000,000,000		$ 1,000,000,000
Debt instrument, repurchase amount						$ 1,590,000,000
Unsecured Debt \| 7.5% debentures due 2025
Debt Instrument [Line Items]
Interest rate		7.50%		7.50%
Long term debt		$ 252,000,000		$ 252,000,000			252,000,000
Unsecured Debt \| 6.5% debentures due 2025
Debt Instrument [Line Items]
Interest rate		6.50%		6.50%
Long term debt		$ 70,000,000		$ 70,000,000			$ 70,000,000