Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014
Income Statement [Abstract]
Net sales from products	$ 925	$ 921	$ 2,550	$ 2,561
Net sales from services	497	515	1,463	1,497
Net sales	1,422	1,436	4,013	4,058
Costs of product sales	395	414	1,139	1,165
Costs of services sales	342	337	993	974
Costs of sales	737	751	2,132	2,139
Gross margin	685	685	1,881	1,919
Selling, general and administrative expenses	259	287	769	902
Research and development expenditures	153	166	468	516
Other charges	42	25	39	49
Operating earnings	231	207	605	452
Other income (expense):
Interest expense, net	(43)	(31)	(122)	(85)
Gains on sales of investments, net	10	1	60	4
Other	(1)	(26)	(3)	(34)
Total other expense	(34)	(56)	(65)	(115)
Earnings from continuing operations before income taxes	197	151	540	337
Income tax expense	71	84	175	107
Earnings from continuing operations	126	67	365	230
Earnings (loss) from discontinued operations, net of tax	(11)	81	(32)	869
Net earnings	115	148	333	1,099
Less: Earnings attributable to noncontrolling interests	0	1	2	1
Net earnings attributable to Motorola Solutions, Inc.	115	147	331	1,098
Earnings from continuing operations, net of tax	126	66	363	229
Earnings (loss) from discontinued operations, net of tax	$ (11)	$ 81	$ (32)	$ 869
Basic:
Continuing operations (US$ per share)	$ 0.63	$ 0.27	$ 1.75	$ 0.91
Discontinued operations (US$ per share)	(0.05)	0.33	(0.15)	3.46
Basic (US$ per share):	0.58	0.60	1.60	4.37
Diluted:
Continuing operations (US$ per share)	0.63	0.27	1.74	0.90
Discontinued operations (US$ per share)	(0.06)	0.32	(0.16)	3.42
Diluted (US$ per share):	$ 0.57	$ 0.59	$ 1.58	$ 4.32
Weighted average common shares outstanding:
Basic (shares)	199.2	246.3	207.2	251.1
Diluted (shares)	201.3	248.2	209.2	254.0
Dividends declared per share (US$ per share)	$ 0.34	$ 0.34	$ 1.02	$ 0.96