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Pensions (Tables) - Pension Plans, Defined Benefit [Member] | 12 Months Ended
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Sep. 24, 2017
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Expected Benefit Payments [Table Text Block] | We anticipate future benefit payments to be paid from the pension trust as follows:
(Thousands of Dollars) |
2018 | 12,500 |
2019 | 11,873 |
2020 | 11,809 |
2021 | 11,782 |
2022 | 11,748 |
2023-2027 | 58,047 |
Schedule of Allocation of Plan Assets [Table Text Block] | The weighted-average asset allocation of our pension assets is as follows:
(Percent) | Policy Allocation |  | Actual Allocation
Asset Class | September 24, 2017 |  | September 24 2017 | September 25 2016
Equity securities | 50 |  | 50 | 50
Debt securities | 35 |  | 33 | 33
TIPS | 5 |  | 4 | 4
Hedge fund investments | 10 |  | 12 | 11
Cash and cash equivalents | — |  | 1 | 2
Schedule of Assumptions Used [Table Text Block] | Weighted-average assumptions used to determine net periodic benefit cost are as follows:
(Percent) | 2017 |  |  | 2016 |  |  | 2015 |
Discount rate | 3.5 |  |  | 4.2 |  |  | 4.2 |
Expected long-term return on plan assets | 5.5 |  |  | 6.3 |  |  | 6.8 |
Weighted-average assumptions used to determine benefit obligations are as follows:
(Percent) | September 24 2017 |  | September 25 2016
Discount rate | 3.7 |  | 3.5
Schedule of Defined Benefit Plans Disclosures [Table Text Block] | The net periodic cost (benefit) components of our pension plans are as follows:
(Thousands of Dollars) | 2017 |  |  | 2016 |  |  | 2015 |
Service cost for benefits earned during the year | 84 |  |  | 197 |  |  | 232 |
Interest cost on projected benefit obligation | 5,394 |  |  | 6,061 |  |  | 8,122 |
Expected return on plan assets | (7,878 | ) |  | (8,698 | ) |  | (9,863 | )
Amortization of net loss | 2,947 |  |  | 2,397 |  |  | 1,682 |
Amortization of prior service benefit | (136 | ) |  | (136 | ) |  | (136 | )
Net periodic pension cost (benefit) | 411 |  |  | (179 | ) |  | 37 |
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block] | Changes in benefit obligations and plan assets are as follows:
(Thousands of Dollars) | 2017 |  |  | 2016 |
Benefit obligation, beginning of year | 202,158 |  |  | 193,751 |
Service cost | 84 |  |  | 197 |
Interest cost | 5,394 |  |  | 6,061 |
Actuarial loss (gain) | (4,241 | ) |  | 13,630 |
Benefits paid | (11,750 | ) |  | (11,481 | )
Benefit obligation, end of year | 191,645 |  |  | 202,158 |
Fair value of plan assets, beginning of year: | 149,131 |  |  | 143,288 |
Actual return on plan assets | 14,721 |  |  | 14,819 |
Benefits paid | (11,750 | ) |  | (11,481 | )
Administrative expenses paid | (2,340 | ) |  | (2,099 | )
Employer contributions | — |  |  | 4,604 |
Fair value of plan assets, end of year | 149,762 |  |  | 149,131 |
Funded status | (41,883 | ) |  | (53,027 | )
Schedule of Amounts Recognized in Balance Sheet [Table Text Block] | Disaggregated amounts recognized in the Consolidated Balance Sheets are as follows:
(Thousands of Dollars) | September 24 2017 |  |  | September 25 2016 |
Pension obligations | (41,883 | ) |  | (53,027 | )
Accumulated other comprehensive loss (before income taxes) | (43,307 | ) |  | (54,862 | )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] | Amounts recognized in accumulated other comprehensive income (loss) are as follows:
(Thousands of Dollars) | September 24 2017 |  |  | September 25 2016 |
Unrecognized net actuarial loss | (43,550 | ) |  | (55,241 | )
Unrecognized prior service benefit | 243 |  |  | 379 |
| (43,307 | ) |  | (54,862 | )
Schedule of Changes in Fair Value of Plan Assets [Table Text Block] | The fair value hierarchy of pension assets at September 25, 2016 is as follows:
(Thousands of Dollars) | NAV |  | Level 1 |  | Level 2 |  | Level 3 |
Cash and cash equivalents | — |  | 2,757 |  | — |  | — |
Domestic equity securities | — |  | 9,669 |  | 49,809 |  | — |
International equity securities | — |  | 6,773 |  | 7,755 |  | — |
TIPS | — |  | 6,883 |  | — |  | — |
Debt securities | 14,558 |  | 25,612 |  | 9,648 |  | — |
Hedge fund investments | 17,531 |  | — |  | — |  | — |
The fair value hierarchy of pension assets at September 24, 2017 is as follows:
(Thousands of Dollars) | NAV |  | Level 1 |  | Level 2 |  | Level 3 |
Cash and cash equivalents | — |  | 1,882 |  | — |  | — |
Domestic equity securities | — |  | 10,484 |  | 49,483 |  | — |
International equity securities | — |  | 7,290 |  | 8,047 |  | — |
TIPS | — |  | 6,553 |  | — |  | — |
Debt securities | 14,711 |  | 26,015 |  | 8,266 |  | — |
Hedge fund investments | 19,067 |  | — |  | — |  | — |

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