Quarterly report pursuant to Section 13 or 15(d)

Share Based Compensation (Details)

Share Based Compensation (Details)
3 Months Ended
Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Director stock awards granted (in shares) 625,000
Employee Stock Purchase Plan shares issued (in shares) 22,577,000
Restricted stock awards granted (in shares) 149,950,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Stock options, outstanding as of December 31, 2018 (in shares) 1,467,391,000
Stock options, granted (in shares) 38,485,000
Stock options, exercised (in shares) (32,732,000)
Stock options, outstanding as of March 31, 2019 (in shares) 1,473,144,000
Shares available for future grants and ESPP purchases as of March 31, 2019 (in shares) 672,581,000