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Stockholders' Equity and Stock-Based Compensation Stock Option Awards (Details) - USD ($) $ in Millions		12 Months Ended
	Feb. 25, 2016	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015	Dec. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Weighted-average remaining contractual life (in years)		8 years 4 months 24 days	7 years 8 months 12 days	6 years 2 months 12 days	5 years
Granted (in shares)		1,547,184	422,386	163,078
Proceeds from stock options exercised		$ 0.2	$ 0.2	$ 0.4
Tax benefit realized from exercise of stock options		0.1	0.4	1.2
Exercises in period, intrinsic value		0.2	1.4	4.5
Vested in period, fair value		8.3	$ 7.5	$ 19.6
Outstanding, intrinsic value		5.4
Exercisable, intrinsic value		0.3
Total compensation cost not yet recognized		$ 13.6
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		1 year 4 months 24 days
Options exercisable, Weighted-average remaining contractual life (in years)		6 years 9 months 18 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)	1,094,306	452,878
Award vesting rights, percentage		33.33%
Expiration period		10 years

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Unrecognized cost of unvested share-based compensation awards.

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Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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

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

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Percentage of vesting of share-based compensation awards.

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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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