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Pension, Postretirement, and Postemployement Obligations (Tables)
 3 Months Ended
Dec. 25, 2016
Pension Postretirement And Postemployment Defined Benefit Plans [Abstract]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
The net periodic postretirement cost (benefit) components for our postretirement plans are as follows:
PENSION PLANS
13 Weeks Ended
 
(Thousands of Dollars)
December 25
2016

December 27
2015

 
 
 
Service cost for benefits earned during the period
21

49

Interest cost on projected benefit obligation
1,349

1,515

Expected return on plan assets
(1,969
)
(2,174
)
Amortization of net loss
736

599

Amortization of prior service benefit
(34
)
(34
)
Pension expense (benefit)
103

(45
)
 
 
 
POSTRETIREMENT MEDICAL PLANS
13 Weeks Ended
 
(Thousands of Dollars)
December 25
2016

December 27
2015

 
 
 
Service cost for benefits earned during the period
3

16

Interest cost on projected benefit obligation
122

156

Expected return on plan assets
(264
)
(331
)
Amortization of net gain
(237
)
(273
)
Amortization of prior service benefit
(365
)
(365
)
Postretirement medical benefit
(741
)
(797
)