Share-based Compensation Arrangement by Share-based Payment Award, Performance Period

No definition available.

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- Definition

Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section 45
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- Definition

Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

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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.

+ References

No definition available.

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- Definition

Percentage of vesting of share-based compensation awards.

+ References

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- Definition

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

+ References

No definition available.

+ Details

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

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- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Share-Based Compensation and Capital Stock Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-Based Compensation and Capital Stock [Line Items]
Shares repurchased (in shares)	495,930		1,285,270
Cost of shares repurchased	$ 38.5		$ 101.9
Shares redeemed for tax withholding for share based compensation (in shares)	2,683		90,872
Payments related to tax withholding for share-based compensation	$ 0.2		$ 7.3
Performance Vested Restricted Stock Units
Share-Based Compensation and Capital Stock [Line Items]
Accelerated compensation cost		$ 2.5		$ 2.5
Performance period, duration			36 months
Performance Vested Restricted Stock Units \| Minimum
Share-Based Compensation and Capital Stock [Line Items]
Vesting service period of shares granted			36 months
Performance period, percent			0.00%
Performance Vested Restricted Stock Units \| Maximum
Share-Based Compensation and Capital Stock [Line Items]
Performance period, percent			200.00%
Stock options
Share-Based Compensation and Capital Stock [Line Items]
Accelerated compensation cost		5.5		5.5
Vesting service period of shares granted			4 years
Restricted stock
Share-Based Compensation and Capital Stock [Line Items]
Accelerated compensation cost		$ 2.1		$ 2.1
Restricted stock \| Minimum
Share-Based Compensation and Capital Stock [Line Items]
Vesting service period of shares granted	12 months		12 months
Restricted stock \| Maximum
Share-Based Compensation and Capital Stock [Line Items]
Vesting service period of shares granted	48 months		48 months