EMPLOYEE STOCK PLANS - Equity Incentive Plan (Details) In Millions, unless otherwise specified	1 Months Ended	9 Months Ended		9 Months Ended	12 Months Ended	9 Months Ended
	Oct. 31, 2012	Sep. 28, 2014	Sep. 28, 2014 2012 Equity Incentive Plan	Sep. 28, 2014 2012 Equity Incentive Plan Stock options	Dec. 31, 2013 2012 Equity Incentive Plan Stock options	Sep. 28, 2014 2012 Equity Incentive Plan Stock options Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant			3.4
Award terms						7 years
Exercise price, as a percent of fair market value of common stock on grant date				100.00%
Vesting percentage, first anniversary		25.00%			25.00%
Award ratable vesting percentage					2.78%
Award ratable vesting period					36 months
Retention grant	1.7
Retention grant vesting period	15 months