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Excludes cash and cash equivalents within disposal group and discontinued 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Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan 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year.","units":{"USD":[{"end":"2012-12-29","val":1603000,"accn":"0000105418-13-000008","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-14","frame":"CY2012Q4I"},{"end":"2013-12-28","val":1758000,"accn":"0000105418-14-000018","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-14","frame":"CY2013Q4I"},{"end":"2014-12-27","val":1929000,"accn":"0000105418-15-000009","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-13","frame":"CY2014Q4I"}]}},"DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree":{"label":"Defined Benefit Plan, Expected Future Benefit Payment, Year Three","description":"Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.","units":{"USD":[{"end":"2012-12-29","val":1603000,"accn":"0000105418-13-000008","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-14","frame":"CY2012Q4I"},{"end":"2013-12-28","val":1758000,"accn":"0000105418-14-000018","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-14","frame":"CY2013Q4I"},{"end":"2014-12-27","val":1929000,"accn":"0000105418-15-000009","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-13","frame":"CY2014Q4I"}]}},"DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo":{"label":"Defined Benefit Plan, Expected Future Benefit Payment, Year Two","description":"Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.","units":{"USD":[{"end":"2012-12-29","val":1603000,"accn":"0000105418-13-000008","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-14","frame":"CY2012Q4I"},{"end":"2013-12-28","val":1758000,"accn":"0000105418-14-000018","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-14","frame":"CY2013Q4I"},{"end":"2014-12-27","val":1929000,"accn":"0000105418-15-000009","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-13","frame":"CY2014Q4I"},{"end":"2015-12-26","val":1975000,"accn":"0000105418-16-000069","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-18","frame":"CY2015Q4I"}]}},"DefinedBenefitPlanInterestCost":{"label":"Defined Benefit Plan, Interest Cost","description":"Amount of cost recognized for passage of time related to defined benefit 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