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Share-Based Compensation - Stock Option Activity (Details)
shares in Millions
 3 Months Ended
Sep. 30, 2020
$ / shares
shares
Options, Number of shares  
Options outstanding, beginning (shares) | shares 4.8
Options granted (shares) | shares 0.7
Options exercised (shares) | shares 0.0
Options canceled or expired (shares) | shares (0.1)
Options outstanding, ending (shares) | shares 5.4
Options exercisable at end of period (shares) | shares 4.7
Options, Weighted average exercise price  
Options outstanding, beginning (dollars per share) | $ / shares $ 23.19
Options granted (dollars per share) | $ / shares 13.38
Options exercised (dollars per share) | $ / shares 0
Options canceled or expired (dollars per share) | $ / shares 16.40
Options outstanding, ending (dollars per share) | $ / shares 24.47
Options exercisable at end of period (dollars per share) | $ / shares $ 24.62