Represents the vesting percentage achieved.

No definition available.

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- Definition

The length of time used to calculate the final payments for performance shares.

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No definition available.

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- Definition

Number of award segments awarded in share-based compensation award.

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No definition available.

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Number of tranches in share-based compensation award.

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- Definition

Percentage of share-based compensation award.

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No definition available.

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- Definition

Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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-Publisher FASB
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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

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

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- Definition

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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- Definition

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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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Percentage of vesting of award under share-based payment arrangement.

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Equity - Performance shares (Details) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021 USD ($) item $ / shares shares	Dec. 31, 2020 item	Dec. 31, 2019 item	Dec. 31, 2018
Performance Shares
Share-based compensation
Vesting terms				3 years
Number of tranches \| item		2	2
Granted (in shares) \| shares	108
Weighted-average fair value per share, Granted (in dollars per share) \| $ / shares	$ 100.29
Unrecognized compensation cost \| $	$ 12.0
Remaining requisite service period (in years)	2 years 6 months
Cancelled (in shares) \| shares	2
Performance shares, vesting based on TSR
Share-based compensation
Vesting terms	3 years
Percentage of share-based compensation award		50.00%	50.00%
Performance shares calculation period (in years)	3 years
Performance shares, vesting based on TSR \| Minimum
Share-based compensation
Performance shares available for vesting (as a percent)	0.00%
Performance shares, vesting based on TSR \| Maximum
Share-based compensation
Performance shares available for vesting (as a percent)	200.00%
Performance shares, vesting based on Adjusted ROIC
Share-based compensation
Vesting terms	3 years
Percentage of share-based compensation award		50.00%	50.00%
Performance shares calculation period (in years)	3 years	3 years	3 years
Performance shares, vesting based on Adjusted ROIC \| Minimum
Share-based compensation
Performance shares available for vesting (as a percent)	0.00%
Performance shares, vesting based on Adjusted ROIC \| Maximum
Share-based compensation
Performance shares available for vesting (as a percent)	200.00%
2018 Awards \| Performance Shares
Share-based compensation
Award pay out achieved (as a percent)	0.00%
2021 Awards \| Performance Shares
Share-based compensation
Number of award segments \| item	2
2021 Award, Segment One \| Performance shares, vesting based on TSR
Share-based compensation
Percentage of share-based compensation award	50.00%
2021 Award, Segment One \| Performance shares, vesting based on Adjusted ROIC
Share-based compensation
Percentage of share-based compensation award	50.00%
Performance shares calculation period (in years)	3 years
2021 Award, Segment Two \| Performance shares, vesting based on Adjusted ROIC
Share-based compensation
Percentage of share-based compensation award	100.00%