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Stockholders' Equity
 12 Months Ended
Dec. 31, 2021
Equity [Abstract]  
Stockholders' Equity Stockholders’ Equity
Share Repurchase Program
The Company has a share repurchase program under which it may repurchase shares of its common stock in the open market or through privately negotiated other transactions, depending on share price, market conditions and other factors. The share repurchase program does not obligate the Company to repurchase any dollar amount or number of shares, and repurchases may be commenced or suspended from time to time without prior notice.
During 2021, the Company repurchased 8.7 million shares of its common stock for $1,500 million. These repurchases occurred under the programs announced on February 7, 2019 and February 10, 2021 by which the Company’s Board of Directors authorized an increase to the Company’s share repurchase program by $1.0 billion and $1.25 billion, respectively. As of December 31, 2021, the Company has $88 million remaining under this program.