Stockholders' Equity

12 Months Ended

Dec. 31, 2019

Common and Preferred Stock [Abstract]

Stockholders' Equity

Stockholders’ Equity

Share Repurchases

In November 2012, our Board of Directors authorized a share repurchase program. In February 2017, our Board of Directors increased the amount that we are authorized to expend on future repurchases to $1,000 under the repurchase program, which superseded all prior repurchase programs. On October 22, 2019, the Board of Directors approved an additional share repurchase authorization of up to $1,000. The repurchase program does not have an expiration date and we are not obligated to acquire a particular number of shares. The repurchase program may be discontinued at any time at our discretion. Under the program, we repurchased 3.8 and 0.7 shares of our common stock at a cost of $416.0 and $85.0 during the years ended December 31, 2019 and 2018, respectively.

Subsequent to December 31, 2019, we repurchased an immaterial number of shares of common stock under our repurchase program at a cost of $1.6. As of February 4, 2020, there is a total of $1,033.9 remaining for repurchases under the repurchase program.