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Stock-Based Compensation Plans - Summary of Nonvested TSRs (Details) - Total Shareholder Return Awards (TSRs)	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Number of Shares at Expected Attainment
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	(158,086)
Change in payout rate (in shares) | shares	(14,259)
Nonvested, ending balance (in shares) | shares	1,367,728
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	36.69
Change in payout rate (in dollars per share) | $ / shares	24.37
Nonvested, ending balance (in dollars per share) | $ / shares	$ 34.59

X

- Definition

The net change in awards outstanding during the reporting period as a result of a change in the expected attainment percentage of an award.

+ References

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The weighted average fair value as of the grant date for equity-based award plans other than stock (unit) option plans that had a net change in the awards outstanding during the reporting period as a result of a change in the expected attainment percentage of an award.

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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
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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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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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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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