Other Financial Data (Earnings (Loss) Per Common Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2012		Sep. 29, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Oct. 01, 2011		Jul. 02, 2011		Apr. 02, 2011		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Basic earnings per common share:
Basic earnings																	$ 878	$ 747	$ 244
Net earnings	336	[1]	206	[1]	182	[1]	157	[1]	184	[1]	128	[1]	349	[1]	497	[1]	881	1,158	633
Weighted average common shares outstanding, basic (shares)																	292.1	333.8	333.3
Basic earnings per common share (US$ per share)	$ 1.20		$ 0.73		$ 0.61		$ 0.51		$ 0.55		$ 0.46		$ 0.15		$ 1.09		$ 3.01	$ 2.24	$ 0.73
Basic earnings per common share (US$ per share)	$ 1.20		$ 0.73		$ 0.63		$ 0.50		$ 0.57		$ 0.38		$ 1.02		$ 1.47		$ 3.01	$ 3.47	$ 1.90
Diluted earnings (loss) per common share:
Basic earnings																	878	747	244
Net earnings	$ 336	[1]	$ 206	[1]	$ 182	[1]	$ 157	[1]	$ 184	[1]	$ 128	[1]	$ 349	[1]	$ 497	[1]	$ 881	$ 1,158	$ 633
Weighted average common shares outstanding, basic (shares)																	292.1	333.8	333.3
Add effect of dilutive securities:
Add effect of dilutive securities: Share-based awards and other (shares)																	5.3	5.9	4.8
Diluted weighted average common shares outstanding (shares)																	297.4	339.7	338.1
Diluted earnings per common share (US$ per share)	$ 1.18		$ 0.72		$ 0.60		$ 0.50		$ 0.54		$ 0.45		$ 0.14		$ 1.07		$ 2.95	$ 2.20	$ 0.72
Diluted earnings per common share (US$ per share)	$ 1.18		$ 0.72		$ 0.61		$ 0.49		$ 0.56		$ 0.38		$ 1.00		$ 1.44		$ 2.96	$ 3.41	$ 1.87

[1] Amounts attributable to Motorola Solutions, Inc. common shareholders.