Shareholders' Equity	12 Months Ended
Dec. 31, 2019
Shareholders’ Equity [Abstract]
Shareholders' Equity	8. Shareholders’ Equity We have had a stock repurchase program in place since 2008 and, through December 31, 2019 we have repurchased shares with a total value of $2.6 billion. As of December 31, 2019, $69,417 was available to be repurchased under announced repurchase authorizations, which does not include an additional $100,000 that was authorized by our Board of Directors in December 2019 but not announced until February 4, 2020. Shares repurchased are being held in treasury stock until they are reissued or retired at the discretion of the Board of Directors. During the years ended December 31, 2019, 2018, and 2017, shares of common stock at total costs of $10,420, $5,411, and $702, respectively, 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

12 Months Ended

Dec. 31, 2019

8. Shareholders’ Equity

We have had a stock repurchase program in place since 2008 and, through December 31, 2019 we have repurchased shares with a total value of $2.6 billion. As of December 31, 2019, $69,417 was available to be repurchased under announced repurchase authorizations, which does not include an additional $100,000 that was authorized by our Board of Directors in December 2019 but not announced until February 4, 2020. Shares repurchased are being held in treasury stock until they are reissued or retired at the discretion of the Board of Directors.

During the years ended December 31, 2019, 2018, and 2017, shares of common stock at total costs of $10,420, $5,411, and $702, respectively, 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.