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Stock Transactions And Stock-Based Compensation - Summary Of Options Outstanding (Details)
shares in Millions
12 Months Ended
Dec. 31, 2021
$ / shares
shares
$7.41 to 12.62  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise price, lower limit (in USD per share) $ 7.41
Exercise price, upper limit (in USD per share) $ 12.62
Outstanding, shares (in shares) | shares 0.3
Outstanding, average exercise price (in USD per share) $ 10.47
Outstanding, average remaining life (in years) 2 years
Exercisable, shares (in shares) | shares 0.3
Exercisable, average exercise price (in USD per share) $ 10.47
$12.63 to 19.02  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise price, lower limit (in USD per share) 12.63
Exercise price, upper limit (in USD per share) $ 19.02
Outstanding, shares (in shares) | shares 1.7
Outstanding, average exercise price (in USD per share) $ 15.81
Outstanding, average remaining life (in years) 5 years 1 month 6 days
Exercisable, shares (in shares) | shares 1.2
Exercisable, average exercise price (in USD per share) $ 15.03
$19.03 to 21.76  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise price, lower limit (in USD per share) 19.03
Exercise price, upper limit (in USD per share) $ 21.76
Outstanding, shares (in shares) | shares 2.2
Outstanding, average exercise price (in USD per share) $ 20.54
Outstanding, average remaining life (in years) 6 years 6 months
Exercisable, shares (in shares) | shares 0.9
Exercisable, average exercise price (in USD per share) $ 20.34
$21.77 to $26.50  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise price, lower limit (in USD per share) 21.77
Exercise price, upper limit (in USD per share) $ 26.50
Outstanding, shares (in shares) | shares 2.0
Outstanding, average exercise price (in USD per share) $ 25.60
Outstanding, average remaining life (in years) 8 years
Exercisable, shares (in shares) | shares 0.3
Exercisable, average exercise price (in USD per share) $ 26.38
$26.51 to 43.56  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise price, lower limit (in USD per share) 26.51
Exercise price, upper limit (in USD per share) $ 43.56
Outstanding, shares (in shares) | shares 1.7
Outstanding, average exercise price (in USD per share) $ 36.95
Outstanding, average remaining life (in years) 9 years
Exercisable, shares (in shares) | shares 0.1
Exercisable, average exercise price (in USD per share) $ 27.24