Pensions (Details) (USD $)	3 Months Ended	12 Months Ended
	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012	Sep. 25, 2011	Sep. 26, 2010
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plan, Period Contributions			$ 398,000	$ 398,000		$ 488,000
Multiemployer Plans, Withdrawal Obligation	1,364,000		1,364,000	1,426,000
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	11,000		11,000
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate			4.00%	4.00%		5.00%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	5.00%		5.00%	4.00%
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax		423,000	(19,880,000)	(51,871,000)
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	28,506,000		28,506,000	66,319,000
Defined Benefit Plan, Benefit Obligation	175,771,000		175,771,000	201,219,000	186,826,000
Defined Benefit Plan, Accumulated Benefit Obligation				201,219,000
Defined Benefit Plan, Service Cost			216,000	30,000	169,000
Defined Benefit Plan, Interest Cost			7,529,000	7,975,000	8,354,000
Defined Benefit Plan, Actuarial Gain (Loss)			(22,155,000)	17,268,000
Defined Benefit Plan, Benefits Paid			(11,038,000)	(10,880,000)
Defined Benefit Plan, Administration Expenses			(1,977,000)	(1,472,000)
Defined Benefit Plan, Contributions by Employer		1,400,000	6,016,000	6,807,000
Defined Benefit Plan, Expected Return on Plan Assets			(9,838,000)	(8,891,000)	(9,733,000)
Defined Benefit Plan, Amortization of Net Gains (Losses)	175,771,000		(2,287,000)	2,370,000	812,000
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)			(136,000)	(136,000)	(137,000)
Defined Benefit Plan, Net Periodic Benefit Cost			58,000	1,348,000	(535,000)
Defined Benefit Plan, Fair Value of Plan Assets	147,265,000		147,265,000	134,900,000	115,596,000
Defined Benefit Plan, Actual Return on Plan Assets			19,364,000	24,849,000
Defined Benefit Plan, Funded Status of Plan	28,506,000		28,506,000	66,319,000
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax	(19,091,000)		(19,091,000)	(50,945,000)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax		(137,000)	789,000	926,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax			(19,091,000)	(50,945,000)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets		0.00%	8.00%	8.00%		8.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase						4.00%
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	11,000		11,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	11,000		11,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	11,000		11,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	11,000		11,000
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	57,000		57,000
Pension Plans, Defined Benefit [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	60.00%		60.00%	63.00%
Defined Benefit Plan, Target Plan Asset Allocations			5500.00%
Pension Plans, Defined Benefit [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	30.00%		30.00%	29.00%
Defined Benefit Plan, Target Plan Asset Allocations			3000.00%
Pension Plans, Defined Benefit [Member] | Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	35,422,000.000		35,422,000.000
Pension Plans, Defined Benefit [Member] | Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	8,035,000.000		8,035,000.000
Pension Plans, Defined Benefit [Member] | Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.000		0.000
Pension Plans, Defined Benefit [Member] | US Treasury Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	4.00%		4.00%	0.00%
Defined Benefit Plan, Target Plan Asset Allocations			500.00%
Pension Plans, Defined Benefit [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6,399,000.000		6,399,000.000
Pension Plans, Defined Benefit [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.000		0.000
Pension Plans, Defined Benefit [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.000		0.000
Pension Plans, Defined Benefit [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	4.00%		4.00%	0.00%
Defined Benefit Plan, Target Plan Asset Allocations			1000.00%
Pension Plans, Defined Benefit [Member] | Hedge Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0		0
Pension Plans, Defined Benefit [Member] | Hedge Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	7,300,000		7,300,000
Pension Plans, Defined Benefit [Member] | Hedge Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0		0
Pension Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	2.00%		2.00%	2.00%
Defined Benefit Plan, Target Plan Asset Allocations			0.00%
Pension Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,255,000.000		2,255,000.000
Pension Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.000		0.000
Pension Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.000		0.000
Pension Plans, Defined Benefit [Member] | Plan Assets- Receivables, net [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	0.00%		0.00%	6.00%
Defined Benefit Plan, Target Plan Asset Allocations			0.00%
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	2,990,000		2,990,000
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate			4.00%	4.00%	5.00%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.00%		4.00%	4.00%
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax			21,899,000	16,570,000
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	4,468,000		4,468,000	4,016,000
Defined Benefit Plan, Benefit Obligation	23,432,000		23,432,000	30,728,000	26,472,000
Defined Benefit Plan, Service Cost			728,000	728,000		927,000
Defined Benefit Plan, Interest Cost			1,125,000	1,109,000		1,600,000
Defined Benefit Plan, Actuarial Gain (Loss)			(7,338,000)	5,269,000
Defined Benefit Plan, Benefits Paid			(2,102,000)	(2,965,000)
Defined Benefit Plan, Contributions by Employer			679,000	(690,000)
Defined Benefit Plan, Expected Return on Plan Assets			(1,474,000)	(2,129,000)		(2,248,000)
Defined Benefit Plan, Amortization of Net Gains (Losses)			1,324,000	(2,451,000)		(2,467,000)
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)			(1,459,000)	(1,459,000)		(1,455,000)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments			0	0		(16,137,000)
Defined Benefit Plan, Net Periodic Benefit Cost			(2,404,000)	(4,202,000)		(19,780,000)
Defined Benefit Plan, Fair Value of Plan Assets	33,920,000		33,920,000	34,263,000	38,529,000
Defined Benefit Plan, Actual Return on Plan Assets			1,495,000	2,127,000
Defined Benefit Plan, Funded Status of Plan	(10,488,000)		(10,488,000)	(3,535,000)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax	34,214,000		34,214,000	30,344,000
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax			12,315,000	13,774,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax			34,214,000	30,344,000
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets			5.00%	6.00%	6.00%
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	2,480,000		2,480,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	2,460,000		2,460,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	2,410,000		2,410,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	2,330,000		2,330,000
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	10,770,000		10,770,000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	22.00%		22.00%	21.00%
Defined Benefit Plan, Target Plan Asset Allocations			2000.00%
Other Postretirement Benefit Plans, Defined Benefit [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	75.00%		75.00%	75.00%
Defined Benefit Plan, Target Plan Asset Allocations			8000.00%
Other Postretirement Benefit Plans, Defined Benefit [Member] | Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.000		0.000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	25,276,000.000		25,276,000.000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.000		0.000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	4.00%		4.00%	2.00%
Defined Benefit Plan, Target Plan Asset Allocations			0.00%
Other Postretirement Benefit Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1,227,000.000		1,227,000.000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.000		0.000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.000		0.000
Other Postretirement Benefit Plans, Defined Benefit [Member] | Plan Assets- Receivables, net [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	0.00%		0.00%	2.00%
Defined Benefit Plan, Target Plan Asset Allocations			0.00%
Other Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funded Status of Plan	2,354,000		2,354,000	2,595,000
Funded Status of Other Plans Recognized In Other Liabilities	279,000		279,000
Domestic Equity Securities [Member] | Pension Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	24,133,000.000		24,133,000.000
Domestic Equity Securities [Member] | Pension Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	42,247,000.000		42,247,000.000
Domestic Equity Securities [Member] | Pension Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.000		0.000
Domestic Equity Securities [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	4,013,000.000		4,013,000.000
Domestic Equity Securities [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1,858,000.000		1,858,000.000
Domestic Equity Securities [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.000		0.000
International Equity Securities [Member] | Pension Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	12,913,000.000		12,913,000.000
International Equity Securities [Member] | Pension Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	8,561,000.000		8,561,000.000
International Equity Securities [Member] | Pension Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.000		0.000
International Equity Securities [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	707,000.000		707,000.000
International Equity Securities [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	839,000.000		839,000.000
International Equity Securities [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 0.000		$ 0.000