Debt and Credit Facilities (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended	3 Months Ended	9 Months Ended				3 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Mar. 30, 2013 Senior Notes Due 2023, 3.500%	Sep. 27, 2014 Revolving Credit Facility 2014 Motorola Solutions Credit Agreement	Sep. 27, 2014 Revolving Credit Facility 2014 Motorola Solutions Credit Agreement	Sep. 27, 2014 Revolving Credit Facility 2011 Motorola Solutions Credit Agreement	Sep. 27, 2014 Revolving Credit Facility 2011 Motorola Solutions Credit Agreement	May 29, 2014 Revolving Credit Facility 2011 Motorola Solutions Credit Agreement	Sep. 27, 2014 Letter of Credit 2014 Motorola Solutions Credit Agreement	Sep. 27, 2014 Senior Notes	Sep. 27, 2014 Senior Notes Senior Note due 2024, 4.00%	Sep. 27, 2014 Senior Notes Senior Note Due 2021, 3.500%	Sep. 27, 2014 Senior Notes Senior Note due 2044, 5.500%	Sep. 27, 2014 Senior Notes Senior Note Due 2017, 6.000%	Sep. 27, 2014 Other income (expense) Senior Notes Senior Note Due 2017, 6.000%
Line of Credit Facility [Line Items]
Extinguishment of Debt, Amount																$ 400,000,000
Debt instrument stated interest rate (percent)					3.50%								4.00%	3.50%	5.50%	6.00%
Early Repayment of Senior Debt																456,000,000
Loss on extinguishment of debt	37,000,000	0	37,000,000	0													37,000,000
Face principal amount of debt issued					600,000,000							1,400,000,000.0	600,000,000	400,000,000	400,000,000
Unsecured syndicated revolving credit facility						2,000,000,000	2,000,000,000			1,500,000,000.0	450,000,000
Proceeds from issuance of debt					588,000,000								583,000,000	393,000,000	394,000,000
Additional borrowings under line of credit agreement						0	0	0	0
Letters of credit issued revolving credit facility											$ 0