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Stock-Based Compensation and Share Repurchase Programs
 3 Months Ended
Mar. 31, 2026
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation and Share Repurchase Programs
13. Stock-Based Compensation and Share Repurchase Programs

Stock-Based Compensation

The following table presents the components and classification of stock-based compensation expense for the three months ended March 31, 2026 and 2025 as follows (in millions):
Three Months Ended March 31,
20262025
Options
$24 $39 
Restricted Stock Units (RSUs)
75 71 
Performance Stock Units (PSUs)
3 1 
Employee Stock Purchase Plan (ESPP)2 4 
Total
$104 $115 
Cost of sales$3 $7 
Research and development64 69 
Selling, general and administrative37 39 
Total
$104 $115 

As of March 31, 2026, there was $978 million of total unrecognized compensation cost related to unvested stock-based compensation with respect to options, RSUs and PSUs granted. That cost is expected to be recognized over a weighted-average period of 2.9 years as of March 31, 2026.

Share Repurchase Programs
As of March 31, 2026, $1.7 billion of our Board of Directors’ authorization for repurchases of our common stock (the 2022 Repurchase Programs) remains outstanding, with no expiration date. There were no shares repurchased during the three months ended March 31, 2026 or 2025.