Share-based Compensation Arrangement by Share-based Payment Award, Number of Compensation Plans

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- Definition

Amount of benefit recorded in the statement of income as a result of re-evaluation of performance-based restricted stock Units granted.

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- Definition

Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other Than Options, EBITDA Performance Target

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Percentage of Target Shares Forfeited

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No definition available.

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- Definition

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

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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- Definition

Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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- Definition

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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- 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 equity instruments other than options outstanding, including both vested and non-vested instruments.

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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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- Definition

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

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

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No definition available.

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- Definition

Percentage of vesting of share-based compensation awards.

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- Definition

Intrinsic value of equity-based compensation awards vested. Excludes stock and unit options.

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Stock-based Compensation - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) plan shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares	Mar. 31, 2018 USD ($)	May 11, 2017 shares	Dec. 31, 2003 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of compensation plans \| plan	2
Total stock-based compensation expense	$ 24.8	$ 13.3	$ 16.2
Stock options granted \| shares			0
Total intrinsic value of options exercised	3.9	5.4	$ 23.9
Cash received from exercise of stock options	4.6	12.8	15.7
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	6.7	7.1	5.3
Performance-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 2.5	(6.5)	3.9
Revaluation benefit from PRSU Granted		$ 9.3	$ 3.8
Nonvested outstanding \| shares	2,000,000	2,700,000	1,700,000
Restricted Stock Units and Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 15.6	$ 12.7	$ 7.0
Nonvested outstanding \| shares	800,000	600,000	400,000
Aggregate intrinsic value of RSUs and DSUs vested during the period	$ 9.3
Long Term Incentive Plan 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common stock shares to be issued (in shares) \| shares					8,700,000
Amended And Restated 2003 Equity Incentive Plan \| Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common stock shares to be issued (in shares) \| shares						11,500,000
Aspirational Plan \| Performance-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	24.6
Aspirational Plan \| Performance-based Restricted Stock Units \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 93.6
Aspirational Plan 2019 \| Performance-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding (in shares) \| shares	1,600,000
Aspirational Plan 2017 \| Performance-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum Adjusted EBITDA				$ 650.0
Nonvested outstanding \| shares	300,000
Percentage of target shares forfeited	66.66%	33.33%
Vesting Scenario One \| Aspirational Plan 2019 \| Performance-based Restricted Stock Units \| Tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum Adjusted EBITDA		$ 600.0
Award vesting rights, percentage		66.00%
Vesting Scenario One \| Aspirational Plan 2019 \| Performance-based Restricted Stock Units \| Tranche two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum Adjusted EBITDA		$ 600.0
Award vesting rights, percentage		66.00%
Vesting Scenario Two \| Aspirational Plan \| Performance-based Restricted Stock Units \| Tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum Adjusted EBITDA		$ 650.0
Vesting Scenario Two \| Aspirational Plan 2019 \| Performance-based Restricted Stock Units \| Tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage		100.00%
Vesting Scenario Two \| Aspirational Plan 2019 \| Performance-based Restricted Stock Units \| Tranche two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum Adjusted EBITDA		$ 650.0
Award vesting rights, percentage		100.00%
Vesting Scenario Four \| Aspirational Plan 2019 \| Performance-based Restricted Stock Units \| Tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum Adjusted EBITDA		$ 600.0
Vesting Scenario Four \| Aspirational Plan 2019 \| Performance-based Restricted Stock Units \| Tranche two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum Adjusted EBITDA		600.0
Minimum \| Vesting Scenario Three \| Aspirational Plan 2019 \| Performance-based Restricted Stock Units \| Tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum Adjusted EBITDA		600.0
Minimum \| Vesting Scenario Three \| Aspirational Plan 2019 \| Performance-based Restricted Stock Units \| Tranche two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum Adjusted EBITDA		600.0
Maximum \| Vesting Scenario Three \| Aspirational Plan 2019 \| Performance-based Restricted Stock Units \| Tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum Adjusted EBITDA		650.0
Maximum \| Vesting Scenario Three \| Aspirational Plan 2019 \| Performance-based Restricted Stock Units \| Tranche two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum Adjusted EBITDA		$ 650.0