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Pension, Postretirement, and Postemployement Obligations (Tables)
 6 Months Ended
Mar. 29, 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
 
26 Weeks Ended
 
 
(Thousands of Dollars)
March 29
2015

March 30
2014

March 29
2015

March 30
2014

 
 
 
 
 
 
 
Service cost for benefits earned during the period
226

39

452

78

 
Interest cost on projected benefit obligation
1,859

1,999

3,718

3,998

 
Expected return on plan assets
(2,466
)
(2,483
)
(4,932
)
(4,966
)
 
Amortization of net loss
420

106

840

212

 
Amortization of prior service benefit
(34
)
(34
)
(68
)
(68
)
 
 
5

(373
)
10

(746
)
 
 
 
 
 
 
 
POSTRETIREMENT MEDICAL PLANS
13 Weeks Ended
 
26 Weeks Ended
 
 
(Thousands of Dollars)
March 29
2015

March 30
2014

March 29
2015

March 30
2014

 
 
 
 
 
 
 
Service cost for benefits earned during the period
39

149

78

298

 
Interest cost on projected benefit obligation
211

228

422

456

 
Expected return on plan assets
(361
)
(371
)
(722
)
(742
)
 
Amortization of net gain
(347
)
(455
)
(694
)
(910
)
 
Amortization of prior service benefit
(365
)
(365
)
(730
)
(730
)
 
 
(823
)
(814
)
(1,646
)
(1,628
)