Subsequent Events	12 Months Ended
Dec. 31, 2017
Subsequent Events	T. SUBSEQUENT EVENTS In January 2018, Teradyne’s Board of Directors declared a quarterly cash dividend of $0.09 per share to be paid on March 23, 2018 to shareholders of record as of February 23, 2018. In January 2018, Teradyne’s Board of Directors cancelled the December 2016 stock repurchase program and authorized a new repurchase program for up to $1.5 billion of common stock through open market purchases or private transactions. Teradyne intends to repurchase $750 million in 2018. While Teradyne declared a quarterly cash dividend and authorized a share repurchase program, it may reduce or eliminate the cash dividend or share repurchase program in the future. Future cash dividends and stock repurchases are subject to the discretion of Teradyne’s Board of Directors which will consider, among other things, Teradyne’s earnings, capital requirements and financial condition.

Subsequent Events

12 Months Ended

Dec. 31, 2017

T. SUBSEQUENT EVENTS

In January 2018, Teradyne’s Board of Directors declared a quarterly cash dividend of $0.09 per share to be paid on March 23, 2018 to shareholders of record as of February 23, 2018.

In January 2018, Teradyne’s Board of Directors cancelled the December 2016 stock repurchase program and authorized a new repurchase program for up to $1.5 billion of common stock through open market purchases or private transactions. Teradyne intends to repurchase $750 million in 2018.

While Teradyne declared a quarterly cash dividend and authorized a share repurchase program, it may reduce or eliminate the cash dividend or share repurchase program in the future. Future cash dividends and stock repurchases are subject to the discretion of Teradyne’s Board of Directors which will consider, among other things, Teradyne’s earnings, capital requirements and financial condition.