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Shareholders' Equity | 3 Months Ended
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Mar. 31, 2019
Equity [Abstract] |
Stockholders' Equity Note Disclosure [Text Block] | V. SHAREHOLDERS’ EQUITY Stock Repurchase Program In January 2018, Teradyne’s Board of Directors cancelled the December 2016 stock repurchase program and authorized a new stock repurchase program for up to $1.5 billion of common stock. Teradyne intends to repurchase $500 million in 2019. During the three months ended March 31, 2019, Teradyne repurchased 4.5 million shares of common stock for $156.5 million at an average price of $35.12 per share. The cumulative repurchases under the $1.5 billion stock repurchase program as of March 31, 2019 totaled 26.1 million shares of common stock for $979.9 million at an average price per share of $37.55. During the three months ended April 1, 2018 , Teradyne repurchased 2.9 million shares of common stock for $ 134.3 million at an average price of $ 45.69 per share. The total price includes commissions and is recorded as a reduction to retained earnings. Dividend Holders of Teradyne’s common stock are entitled to receive dividends when they are declared by Teradyne’s Board of Directors. In January 2019, Teradyne’s Board of Directors declared a quarterly cash dividend of $0.09 per share. Dividend payments for the three months ended March 31, 2019 were $15.6 million. In January 2018, Teradyne’s Board of Directors declared a quarterly cash dividend of $0.09 per share. Dividend payments for the three months ended April 1, 2018 were $17.6 million. 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.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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