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Stock-Based Compensation Plans (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Stock Option Activity
A summary of stock option activity is as follows:
Number of
Shares
Weighted Average
Exercise Price ($)
Weighted Average
Remaining Contractual
Term (Years)
Aggregate Intrinsic Value
of In-the-Money
Options ($)
Outstanding, December 31, 20202,186,511 $17.87 
Exercised
(546,192)16.22 
Outstanding, December 31, 20211,640,319 $18.42 3.26$26,697,917 
Exercisable, December 31, 20211,640,319 $18.42 3.26$26,697,917 
Total Shareholder Return Awards (TSRs)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Nonvested Performance Award Activity
A summary of nonvested TSRs is as follows:
Number of
Shares		Weighted Average
Grant Date Fair Value
Nonvested as of December 31, 20201,367,728 $34.59 
Granted367,317 50.60 
Vested(782,588)31.31 
Forfeited(189,030)38.85 
Change in payout rate391,294 31.31 
Nonvested as of December 31, 20211,154,721 $40.10 
Total Shareholder Return Awards (TSRs) | Monte Carlo Simulation Model  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Grant Date Fair Value Weighted Average Assumptions, Awards Other Than Options
The fair value of TSRs granted during the years ended December 31, 2021, 2020, and 2019, were estimated on the date of grant using the Monte Carlo simulation model, acceptable under ASC 718, using the following weighted-average assumptions:
 Years Ended December 31,
 202120202019
Expected life (years)2.82.82.8
Risk-free interest rate0.3 %0.5 %2.5 %
Volatility41.2 %31.4 %29.3 %
Expected dividend yield— — — 
Restricted Stock Units (RSUs)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Nonvested Restricted Share Unit Activity
A summary of nonvested RSUs is as follows:
Number of
Shares		Weighted Average
Grant Date Fair Value
Nonvested as of December 31, 20201,118,182 $27.34 
Granted630,717 38.63 
Vested(522,618)27.69 
Forfeited(280,130)31.10 
Nonvested as of December 31, 2021946,151 $33.57