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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Unrecognized cost of unvested share-based compensation awards.

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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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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.

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

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

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An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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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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STOCK-BASED COMPENSATION - Narrative (Detail) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Jul. 02, 2015	Sep. 30, 2015	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period, net of forfeitures			166,751
Requisite service periods of awards, in years			3 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercisable, vesting period, in years			4 years
Total unrecognized compensation costs		$ 2.6	$ 2.6
Weighted-average period for cost recognition, in years			2 years
Restricted stock awards/stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercisable, vesting period, in years			3 years
Total unrecognized compensation costs		18.9	$ 18.9
Weighted-average period for cost recognition, in years			2 years
Awards granted during period			325,411
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period			139,259
Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period, in years			8 years
Directors and certain executive officers \| Minimum \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period, in years			8 years
Directors and certain executive officers \| Maximum \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period, in years			10 years
SeaSpine Inc. \| Spinoff
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental increase in stock based award expense after spinoff	$ 4.4
Allocated Share-based Compensation Expense		3.0
Total unrecognized compensation costs		$ 1.4	$ 1.4