Shareholders' Equity	6 Months Ended
Jun. 30, 2019
Shareholders’ Equity [Abstract]
Shareholders' Equity	6. Shareholders’ Equity Through June 30, 2019, we had announced authorizations by our Board of Directors of repurchases of shares of common stock, which in the aggregate, authorized expenditures of up to $2.6 billion. As of June 30, 2019, $46,589 was available to repurchase shares under the previously announced repurchase authorizations. On July 23, 2019, we announced that our Board of Directors authorized the expenditure of an additional $100,000 to repurchase shares of our common stock. Shares repurchased are being held in treasury stock until they are reissued or retired at the discretion of the Board of Directors. During the six months ended June 30, 2019, 17 shares of common stock at a total cost of $10,398 were netted and surrendered as payment for minimum statutory withholding obligations in connection with the vesting of outstanding stock awards. Shares surrendered by the participants in accordance with the applicable award agreements and plan are deemed repurchased by us but are not part of publicly announced share repurchase programs.

Shareholders' Equity

6 Months Ended

Jun. 30, 2019

6. Shareholders’ Equity

Through June 30, 2019, we had announced authorizations by our Board of Directors of repurchases of shares of common stock, which in the aggregate, authorized expenditures of up to $2.6 billion. As of June 30, 2019, $46,589 was available to repurchase shares under the previously announced repurchase authorizations. On July 23, 2019, we announced that our Board of Directors authorized the expenditure of an additional $100,000 to repurchase shares of our common stock. Shares repurchased are being held in treasury stock until they are reissued or retired at the discretion of the Board of Directors.

During the six months ended June 30, 2019, 17 shares of common stock at a total cost of $10,398 were netted and surrendered as payment for minimum statutory withholding obligations in connection with the vesting of outstanding stock awards. Shares surrendered by the participants in accordance with the applicable award agreements and plan are deemed repurchased by us but are not part of publicly announced share repurchase programs.