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Shareholders' Equity and Long-Term Incentive Compensation - Common Stock in Treasury, Dividends and Preferred Stock (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Common Stock in Treasury      
Restricted stock and restricted stock unit vesting $ (5.0) $ (4.4) $ (6.6)
Preferred Stock      
Preferred stock outstanding (shares) 0 0 0
Authorized no par value preferred stock (in shares) 3,000,000.0 3,000,000.0 3,000,000.0
Preferred stock, par value (in dollars per share) $ 0 $ 0 $ 0
Treasury Stock      
Common Stock in Treasury      
Restricted stock and restricted stock unit vesting $ 7.7 $ 8.4 $ 15.8
Decrease in stock by the settlement of restricted stock units   $ 8.4 $ 15.8