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Disclosures About Defined Pension Benefit Obligations (Schedule of Pension Plans' Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 26, 2015
Jun. 27, 2014
Jun. 26, 2015
Jun. 27, 2014
Component:        
Service cost $ 9,988 $ 10,529 $ 26,824 $ 31,401
Interest cost 19,245 20,270 52,006 60,221
Expected return on plan assets (24,195) (22,712) (65,610) (67,552)
Amortization of previously unrecognized items 6,362 4,941 16,798 14,617
Settlement loss 111 142 270 422
Net periodic benefit cost $ 11,511 $ 13,170 $ 30,288 $ 39,109