Commitments And Contingencies	3 Months Ended
Commitments And Contingencies	Apr. 01, 2012
Commitments And Contingencies [Abstract]
Commitments And Contingencies	O. Commitments and Contingencies *Purchase Commitments* As of April 1, 2012, Teradyne had entered into purchase commitments for certain components and materials. The purchase commitments aggregate to approximately $273.2 million, of which $272.8 million is for less than one year. *Legal Claims* Teradyne is subject to various legal proceedings and claims which have arisen in the ordinary course of business. In the opinion of management, the ultimate disposition of these matters will not have a material adverse effect on Teradyne's results of operations, financial condition or cash flows.

The entire disclosure for commitments and contingencies.

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