Retirement Plans (Narrative) (Details) (USD $)	12 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, General Information	21
Period of years in executive position	10
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Pension and Other Postretirement Benefit Contributions	$ 25,349,000	$ 23,886,000	$ 20,318,000
Minimum Required Contribution For Retirement Plans	0
Vesting percentage of participant's right to company contribution	25.00%
Enhanced pension benefits	0	0	6,167,000
Decrease in earnings before income taxes due to quarter percentage point decrease in discount rate	2,100,000
Decrease in earnings before income taxes due to quarter percentage point decrease in long-term rate of return	800,000
Defined Contribution Plan Name [Domain]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefit Contributions	1,000,000	1,000,000	1,200,000
Participants Under Age 65 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%		4.50%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate	2030		2029
Non Qualified Deferred Compensation Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%
Pension and Other Postretirement Benefit Contributions	$ 1,100,000	$ 1,100,000	$ 1,100,000
Supplemental Executive Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	4.00%
Salary [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	50.00%
Bonus [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	85.00%
Participants Age 65 Or Older [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%		4.50%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate	2028		2027
Comprehensive Health Plan for Retirees [Domain] | Participants Under Age 65 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate		4.80%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate		2038
Comprehensive Health Plan for Retirees [Domain] | Participants Age 65 Or Older [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate		4.80%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate		2037
Executive Medical Reimbursement Plan [Domain] | Participants Under Age 65 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate		4.90%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate		2045
Executive Medical Reimbursement Plan [Domain] | Participants Age 65 Or Older [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate		4.90%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate		2045