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Pension, Postretirement, and Postemployement Obligations (Tables)
 9 Months Ended
Jun. 28, 2015
Pension Postretirement And Postemployment Defined Benefit Plans [Abstract]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
The net periodic cost (benefit) components of our pension and postretirement medical plans are as follows:
PENSION PLANS
13 Weeks Ended
 
39 Weeks Ended
 
(Thousands of Dollars)
June 28
2015

June 29
2014

June 28
2015

June 29
2014

 
 
 
 
 
Service cost for benefits earned during the period
226

39

678

117

Interest cost on projected benefit obligation
1,859

1,999

5,577

5,997

Expected return on plan assets
(2,466
)
(2,483
)
(7,398
)
(7,449
)
Amortization of net loss
420

106

1,260

318

Amortization of prior service benefit
(34
)
(34
)
(102
)
(102
)
Pension expense (benefit)
5

(373
)
15

(1,119
)
 
 
 
 
 
POSTRETIREMENT MEDICAL PLANS
13 Weeks Ended
 
39 Weeks Ended
 
(Thousands of Dollars)
June 28
2015

June 29
2014

June 28
2015

June 29
2014

 
 
 
 
 
Service cost for benefits earned during the period
39

149

117

447

Interest cost on projected benefit obligation
211

228

633

684

Expected return on plan assets
(361
)
(371
)
(1,083
)
(1,113
)
Amortization of net gain
(347
)
(455
)
(1,041
)
(1,365
)
Amortization of prior service benefit
(365
)
(365
)
(1,095
)
(1,095
)
Postretirement medical benefit
(823
)
(814
)
(2,469
)
(2,442
)