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Employee Compensation and Benefit Plans - Schedule of Stock Option Activity (Footnote) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options which expired unexercised 10,208 0 4,913
Market-based options that have not met performance criteria (in shares) 5,167    
Average common stock trading price to determine market condition for options exercise $ 484.19    
Net aggregate intrinsic value of stock options outstanding $ 0.1    
Market-based options outstanding (in shares) 44,500    
Market-based options outstanding, exercisable (in shares) 39,333    
Weighted average remaining contractual term of options outstanding 2 years 7 days    
Weighted average remaining contractual term of options exercisable 1 year 11 months 23 days    
Total fair value of stock options vested and became exercisable $ 0.3 $ 0.3 $ 0.6
Chief Financial Officer      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options granted (in shares)     2,212
Stock options granted, exercise price (in dollars per share)     $ 32.55