Item 1A. Risk Factors

We do not believe that there have been any material changes to the risk factors previously disclosed in our 2021 Annual Report.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

In July 2012, we announced that our Board of Directors authorized us to repurchase up to $2.0 billion of our common stock on the open market or in private transactions. The Board of Directors increased this authority by an additional $1.5 billion in each of November 2016 and February 2018, by an additional $2.0 billion in November 2018 and by an additional $1.5 billion in October 2020. During the first quarter of 2022, we did not repurchase any shares under this authority. We had $1.3 billion remaining under this program as of March 31, 2022. This program does not have an expiration date.