Retirement Plans (Reconciliation Of The Changes In Benefit Obligations, Plan Assets And Funded Status Of Retirement Plans) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Cost of VERP	$ 0	$ 0	$ (6,167)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	336,425
Fair value at end of year	356,312	336,425
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Actuarial gains (losses) arising during the period	49,173	(98,764)	78,619
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	(43,928)	117,659	(65,087)
Qualified Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	382,068	466,097
Service cost	7,633	10,210	9,068
Interest cost	20,196	19,964	19,891
Participant contributions	0	0
Actuarial loss	59,661	(85,578)
Benefits paid	(34,662)	(28,625)
Other	0	0
Cost of VERP	0	0	(6,167)
Obligation at end of year	434,896	382,068	466,097
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	336,425	311,988
Actual return on plan assets	34,549	33,062
Participant contributions	0	0
Employer contributions	20,000	20,000
Benefits paid and other	(34,662)	(28,625)
Fair value at end of year	356,312	336,425	311,988
Funded status at end of year	(78,584)	(45,643)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Current liabilities	0	0
Noncurrent liabilities	(78,584)	(45,643)
Total liability recognized	(78,584)	(45,643)
Unamortized actuarial loss, net	114,482	68,454
Unamortized prior service cost	0	0
Total	114,482	68,454
Actuarial gains (losses) arising during the period	49,603	(95,925)
Amortization of actuarial loss	(3,575)	(15,665)	(11,871)
Amortization of prior service cost	0	0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	(46,028)	111,590
Net periodic benefit cost and other losses	6,912	23,124	26,665
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income	52,940	(88,466)
Net actuarial loss	8,278
Prior service cost	0
Total	8,278
Non-Qualified Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	64,717	63,156
Service cost	490	543	466
Interest cost	3,049	2,664	3,056
Participant contributions	0	0
Actuarial loss	5,652	1,773
Benefits paid	(4,175)	(3,419)
Other	0	0
Obligation at end of year	69,733	64,717	63,156
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	0	0
Actual return on plan assets	0	0
Participant contributions	0	0
Employer contributions	4,175	3,419
Benefits paid and other	(4,175)	(3,419)
Fair value at end of year	0	0	0
Funded status at end of year	(69,733)	(64,717)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Current liabilities	(4,479)	(4,392)
Noncurrent liabilities	(65,254)	(60,325)
Total liability recognized	(69,733)	(64,717)
Unamortized actuarial loss, net	26,425	21,632
Unamortized prior service cost	1,080	1,349
Total	27,505	22,981
Actuarial gains (losses) arising during the period	5,652	1,773
Amortization of actuarial loss	(859)	(2,170)	(1,140)
Amortization of prior service cost	(269)	(269)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	(4,524)	666
Net periodic benefit cost and other losses	4,667	5,646	5,094
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income	9,191	4,980
Net actuarial loss	1,134
Prior service cost	269
Total	1,403
Postretirement Health Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	33,243	37,307
Service cost	0	0	61
Interest cost	1,639	1,586	1,617
Participant contributions	123	131
Actuarial loss	(6,082)	(4,612)
Benefits paid	(1,456)	(1,331)
Other	159	162
Obligation at end of year	27,626	33,243	37,307
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	0	0
Actual return on plan assets	0	0
Participant contributions	123	131
Employer contributions	1,174	1,038
Benefits paid and other	(1,297)	(1,169)
Fair value at end of year	0	0	0
Funded status at end of year	(27,626)	(33,243)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Current liabilities	(1,269)	(1,438)
Noncurrent liabilities	(26,357)	(31,805)
Total liability recognized	(27,626)	(33,243)
Unamortized actuarial loss, net	2,400	9,024
Unamortized prior service cost	0	0
Total	2,400	9,024
Actuarial gains (losses) arising during the period	(6,082)	(4,612)
Amortization of actuarial loss	(542)	(791)	(89)
Amortization of prior service cost	0	0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	6,624	5,403
Net periodic benefit cost and other losses	2,181	2,377	1,767
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income	(4,443)	(3,026)
Net actuarial loss	181
Prior service cost	0
Total	$ 181