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Stock-Based Compensation - Stock Option Activity (Details)
shares in Millions
 9 Months Ended
Sep. 30, 2022
$ / shares
shares
Number of Shares  
Options outstanding, beginning (shares) | shares 1.4
Options exercised (shares) | shares 0.0
Options canceled or expired (shares) | shares (0.6)
Options outstanding, ending (shares) | shares 0.8
Options exercisable at end of period (shares) | shares 0.5
Weighted Average Exercise Price  
Options outstanding, beginning (dollars per share) | $ / shares $ 20.36
Options exercised (dollars per share) | $ / shares 26.22
Options canceled or expired (dollars per share) | $ / shares 26.85
Options outstanding, ending (dollars per share) | $ / shares 15.62
Options exercisable at end of period (dollars per share) | $ / shares $ 16.99