XML 35 R75.htm IDEA: XBRL DOCUMENT v3.2.0.727

Net Income Per Common Share - Additional Information (Detail) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jul. 05, 2015	Jun. 29, 2014	Jul. 05, 2015	Jun. 29, 2014
Net Income Loss Per Common Share
Exercise of stock options	0.2	0.3	0.2	0.3

X

- Definition

Net Income (Loss) Per Common Share [Line Items]

+ References

No definition available.

+ Details

Name:	ter_NetIncomeLossPerCommonShareLineItems
Namespace Prefix:	ter_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Stock Issued During Period Shares Sale Of Stock And Exercise Of Stock Options

+ References

No definition available.

+ Details

Name:	ter_StockIssuedDuringPeriodSharesSaleOfStockAndExerciseOfStockOptions
Namespace Prefix:	ter_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration