Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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- Definition

Amount of commitment made to pay deferred cash remuneration.

+ References

No definition available.

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The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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- Definition

Amount of distribution made to individual in accordance with deferred compensation arrangement.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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

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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- Definition

Gross number of share options (or share units) granted during the period.

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- Definition

Amount of capitalized and expensed compensation cost from equity-based compensation arrangements.

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Share-based compensation - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
	Mar. 15, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ 1.2	$ 0.2
Amount paid to employees for share-based awards		$ 0.3	3.3
Unrecognized share-based compensation costs			$ 34.3
Options granted in the period (in shares)		0	1,374,945
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average recognition period (years)			2 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average recognition period (years)			3 years
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average recognition period (years)		1 year 7 months 30 days
Awards granted in the period (in shares)		0	1,411,714
Retention Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted under the retention program	$ 13.8
Amount paid for retention awards	$ 6.9
Retention program expense		$ 6.3
Long Term Incentive Plan 2019 \| Performance share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average recognition period (years)		1 year 9 months
Awards granted in the period (in shares)		0	401,311
Long Term Incentive Plan 2020 \| Performance share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ 1.6
Award vesting period				3 years