Acquisitions - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012 Entity	Dec. 31, 2012 Patents and developed technology	Dec. 31, 2012 Customer relationships	Dec. 31, 2012 Trade names and other	May 22, 2012 Motorola Mobile	May 22, 2012 Motorola Mobile Patents and developed technology	May 22, 2012 Motorola Mobile Customer relationships	Dec. 31, 2012 Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Business acquisition, per share acquisition price of outstanding common shares					$ 40
Purchase price of acquisitions					$ 12,400,000,000			$ 1,171,000,000
Business acquisition, unvested Motorola stock options and restricted stock units assumed					401,000,000
Business acquisition, transaction costs					50,000,000
Business acquisition, cash acquired					2,900,000,000
Business acquisition, acquired intangible assets						5,500,000,000	700,000,000	462,000,000
Business acquisition, goodwill					2,500,000,000			733,000,000
Business acquisition, other net assets acquired					800,000,000
Actual number of other acquisitions and purchase of intangible completed	52
Business acquisition, net liabilities assumed								24,000,000
Amount of goodwill expected to be deductible for tax purposes								$ 29,000,000
Acquired intangible assets, weighted-average useful life		8 years 10 months 24 days	7 years 4 months 24 days	9 years