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Stock-Based Compensation Plans - Summary of Nonvested TSRs (Details) - Total Shareholder Return Awards (TSRs)
3 Months Ended
Mar. 31, 2020
$ / shares
shares
Number of Shares  
Nonvested, beginning balance (in shares) | shares 1,062,291
Granted (in shares) | shares 677,195
Vested (in shares) | shares (199,413)
Forfeited (in shares) | shares (59,733)
Change in payout rate (in shares) | shares (14,259)
Nonvested, ending balance (in shares) | shares 1,466,081
Weighted Average Grant Date Fair Value  
Nonvested, beginning balance (in dollars per share) | $ / shares $ 35.77
Granted (in dollars per share) | $ / shares 30.01
Vested (in dollars per share) | $ / shares 24.37
Forfeited (in dollars per share) | $ / shares 38.95
Change in payout rate (in dollars per share) | $ / shares 24.37
Nonvested, ending balance (in dollars per share) | $ / shares $ 34.64