Stock Repurchase Program	12 Months Ended
Dec. 31, 2016
Stock Repurchase Program	S. STOCK REPURCHASE PROGRAM In January 2015, the Board of Directors cancelled the November 2010 stock repurchase program and authorized a new stock repurchase program for up to $500 million of common stock. The cumulative repurchases as of December 31, 2016 totaled 22.5 million shares of common stock for $446 million at an average price per share of $19.87. The total price includes commissions and is recorded as a reduction to retained earnings. In December 2016, the Board of Directors approved a new $500 million share repurchase authorization which commenced on January 1, 2017. Teradyne intends to repurchase at least $200 million in 2017. Teradyne’s January 2015 stock repurchase program was terminated on December 31, 2016.

S. STOCK REPURCHASE PROGRAM

In January 2015, the Board of Directors cancelled the November 2010 stock repurchase program and authorized a new stock repurchase program for up to $500 million of common stock. The cumulative repurchases as of December 31, 2016 totaled 22.5 million shares of common stock for $446 million at an average price per share of $19.87. The total price includes commissions and is recorded as a reduction to retained earnings.

In December 2016, the Board of Directors approved a new $500 million share repurchase authorization which commenced on January 1, 2017. Teradyne intends to repurchase at least $200 million in 2017. Teradyne’s January 2015 stock repurchase program was terminated on December 31, 2016.