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Stock-Based Compensation Plans - Summary of Nonvested TSRs (Details) - Total Shareholder Return Awards (TSRs)	6 Months Ended
	Jun. 30, 2021 $ / shares shares
Number of Shares
Nonvested, beginning balance (in shares) | shares	1,367,728
Granted (in shares) | shares	367,317
Vested (in shares) | shares	(782,588)
Forfeited (in shares) | shares	(83,519)
Change in payout rate (in shares) | shares	391,294
Nonvested, ending balance (in shares) | shares	1,260,232
Weighted Average Grant Date Fair Value
Nonvested, beginning balance (in dollars per share) | $ / shares	$ 34.59
Granted (in dollars per share) | $ / shares	50.60
Vested (in dollars per share) | $ / shares	31.31
Forfeited (in dollars per share) | $ / shares	37.18
Change in payout rate (in dollars per share) | $ / shares	31.31
Nonvested, ending balance (in dollars per share) | $ / shares	$ 40.11

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- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Change In Payout Rate

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Share-Based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Change In Payout Rate, Weighted Average Grant Date Fair Value

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 2
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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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