Share-based Compensation Arrangement by Share-based Payment Award, Annual Vesting After Initial Cliff

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Initial Cliff, Percent

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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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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- Definition

Amount of tax benefit from exercise of stock options granted under share-based compensation arrangement.

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- Definition

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

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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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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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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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- Definition

Percentage of vesting of share-based compensation awards.

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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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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Stockholders' Equity and Stock-Based Compensation Stock Option Awards (Details) - USD ($) $ in Millions				12 Months Ended
	Jan. 29, 2018	Feb. 06, 2017	Feb. 25, 2016	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Weighted-average remaining contractual life (in years)				6 years 10 months 17 days	7 years 3 months 18 days	8 years 4 months 24 days	7 years 8 months 12 days
Granted (in shares)				637,115	956,809	1,547,184
Proceeds from stock options exercised				$ 0.2	$ 0.1	$ 0.2
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options				0.1	0.1	0.1
Exercises in period, intrinsic value				1.1	0.2	0.2
Vested in period, fair value				12.5	$ 11.3	$ 8.3
Outstanding, intrinsic value				22.5
Exercisable, intrinsic value				14.7
Total compensation cost not yet recognized				$ 5.1
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition				1 year 2 months 12 days
Options exercisable, Weighted-average remaining contractual life (in years)				5 years 10 months 13 days
Nonqualified Stock Options Under Long Term Incentive Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Initial cliff				25.00%
Annual vesting after initial cliff				25.00%
Granted (in shares)	637,115	956,809	1,094,306	452,878
Award vesting rights, percentage				33.33%
Expiration period				10 years