Share-Based Compensation Arrangement By Share-Based Payment Award, Award Grant Annual Increment, Percentage

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- Definition

Number of annual performance periods over which performance targets are measured for determining potential compensation under the performance share awards.

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- Definition

Percentage of award which can potentially be earned over the award period of share-based compensation awards.

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- Definition

Share Based Compensation Arrangement by Share Based Payment Award, Share Ratio

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No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate carrying value as of the balance sheet date of the liabilities for deferred compensation arrangements payable within one year (or the normal operating cycle, if longer). Represents currently earned compensation under cash arrangements (such as a profit-sharing plan, rabbi trust, and employee contract--excluding equity-based arrangements) that is not actually paid until a later date.

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- Definition

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

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Amount of cost to be recognized for option under share-based payment arrangement.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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 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

Amount of cash paid to settle liability for award under share-based payment arrangement.

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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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

Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Stock-Based Compensation - Additional Information (Details) $ / shares in Units, $ in Millions				1 Months Ended	12 Months Ended
	Feb. 25, 2020 shares	Feb. 14, 2019 shares	Feb. 06, 2018 shares	Jun. 30, 2018	Dec. 31, 2020 USD ($) performance_period $ / shares shares	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2018 USD ($) $ / shares	Jun. 30, 2019 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense					$ 14.5	$ 14.9	$ 12.0
Weighted-average grant date fair value (in dollars per share) \| $ / shares					$ 8.62	$ 6.39	$ 9.88
Intrinsic value of stock options exercised					$ 128.9	$ 2.0	$ 28.7
Fair value of stock options vested					9.6	6.2	5.9
Unamortized compensation costs, stock options					$ 11.5
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized compensation costs, weighted average period of recognition					1 year 8 months 12 days
Awards granted (in shares) \| shares					131,313
Unrecognized compensation cost, other awards					$ 6.4
Fair value of awards vested					$ 16.7	5.5	0.9
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Low end of exercise price range (in dollars per share) \| $ / shares					$ 12.65
High end of exercise price range (in dollars per share) \| $ / shares					$ 55.74
Unamortized compensation costs, weighted average period of recognition					2 years 6 months
Stock options \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual lives					4 years
Stock options \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual lives					10 years
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares) \| shares	107,297	278,780	197,727		179,045
Annual increment percentage at which awards are granted					33.33%
Number of annual award performance periods \| performance_period					3
Service period					1 year
Vesting period					3 years
Performance shares \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of award which can potentially be earned					0.00%
Performance shares \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of award which can potentially be earned					150.00%
Phantom stock units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense					$ 11.5	4.1	1.1
Unamortized compensation costs, weighted average period of recognition					2 years 3 months 18 days
Unrecognized compensation cost, other awards					$ 16.0
Liability for cash-settled awards					10.1	3.3
Amounts paid on cash-settled awards					$ 4.7	2.5	4.2
Phantom stock units (PSUs) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					3 years
Phantom stock units (PSUs) \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					4 years
Stock appreciation rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense					$ 69.7	10.7	(6.7)
Unamortized compensation costs, weighted average period of recognition					2 years 8 months 12 days
Vesting period					4 years
Unrecognized compensation cost, other awards					$ 71.2
Liability for cash-settled awards					54.6	14.4
Amounts paid on cash-settled awards					$ 32.6	$ 3.5	$ 10.5
2018 Long Term Incentive Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock available for awards, up to (in shares) \| shares								12,700,000
Shares available for future grants (in shares) \| shares					7,612,054
Share Based Compensation Arrangement by Share Based Payment Award, Share Ratio				1
2018 Long Term Incentive Compensation Plan \| Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement by Share Based Payment Award, Share Ratio				2.30