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Postretirement Obligations (Tables) (Other Postretirement Benefit Plans, Defined Benefit [Member]) | 12 Months Ended
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Sep. 30, 2012
Other Postretirement Benefit Plans, Defined Benefit [Member] |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Schedule of Defined Benefit Plans Disclosures [Table Text Block] | The net periodic postretirement benefit cost components for our postretirement plans are as follows:
(Thousands of Dollars) | 2012 |  |  | 2011 |  |  | 2010 |
Service cost for benefits earned during the year | 728 |  |  | 927 |  |  | 361 |
Interest cost on projected benefit obligation | 1,109 |  |  | 1,600 |  |  | 2,971 |
Expected return on plan assets | (2,129 | ) |  | (2,248 | ) |  | (2,274 | )
Amortization of net actuarial gain | (2,451 | ) |  | (2,467 | ) |  | (2,447 | )
Amortization of prior service benefit | (1,459 | ) |  | (1,455 | ) |  | (1,994 | )
Curtailment gains | — |  |  | (16,137 | ) |  | (43,008 | )
Net periodic postretirement benefit | (4,202 | ) |  | (19,780 | ) |  | (46,391 | )
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) | 2012 |  |  | 2011 |
Benefit obligation, beginning of year | 26,472 |  |  | 50,482 |
Service cost | 728 |  |  | 927 |
Interest cost | 1,109 |  |  | 1,600 |
Actuarial (gain) loss | 5,269 |  |  | (2,311 | )
Benefits paid, net of premiums received | (2,965 | ) |  | (2,922 | )
Changes in plan provisions | — |  |  | (5,931 | )
Curtailment gains | — |  |  | (15,535 | )
Medicare Part D subsidies | 115 |  |  | 162 |
Benefit obligation, end of year | 30,728 |  |  | 26,472 |
Fair value of plan assets, beginning of year | 38,529 |  |  | 41,447 |
Actual return on plan assets | 2,127 |  |  | 19 |
Employer contributions (reimbursements) | (690 | ) |  | 1,347 |
Benefits paid, net of premiums and Medicare Part D subsidies received | (2,851 | ) |  | (2,760 | )
Benefits paid for active employees | (2,852 | ) |  | (1,524 | )
Fair value of plan assets at measurement date | 34,263 |  |  | 38,529 |
Funded status - benefit obligation less than plan assets | (3,535 | ) |  | (12,057 | )
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 30 2012 |  |  | September 25 2011 |
Noncurrent assets | 7,551 |  |  | 14,934 |
Postretirement benefit obligations | 4,016 |  |  | 2,877 |
Accumulated other comprehensive income (before income tax benefit) | 30,344 |  |  | 42,379 |
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] | Amounts recognized in accumulated other comprehensive income are as follows:
(Thousands of Dollars) | September 30 2012 |  |  | September 25 2011 |
Unrecognized net actuarial gain | 16,570 |  |  | 27,145 |
Unrecognized prior service benefit | 13,774 |  |  | 15,234 |
| 30,344 |  |  | 42,379 |
Schedule of Assumptions Used [Table Text Block] | Weighted-average assumptions used to determine benefit obligations are as follows:
(Percent) | September 30 2012 |  | September 25 2011
Discount rate | 3.85 |  | 4.4
Expected long-term return on plan assets | 4.5 |  | 5.75
Weighted-average assumptions used to determine net periodic benefit cost are as follows:
(Percent) | 2012 |  |  | 2011 |  |  | 2010 |
Discount rate | 4.4 |  |  | 4.8 |  |  | 5.5 |
Expected long-term return on plan assets | 5.75 |  |  | 5.75 |  |  | 5.75 |
Schedule of Health Care Cost Trend Rates [Table Text Block] | Assumed health care cost trend rates are as follows:
(Percent) | September 30 2012 |  | September 25 2011
Health care cost trend rates | 9.0 |  | 9.0
Rate to which the cost trend rate is assumed to decline (the “Ultimate Trend Rate”) | 5.0 |  | 5.0
Year in which the rate reaches the Ultimate Trend Rate | 2020 |  | 2019
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block] | A one percentage point change in assumed health care cost trend rates would have the following annualized effects on reported amounts for 2012:
| One Percentage Point |
(Thousands of Dollars) | Increase |  |  | Decrease |
Effect on net periodic postretirement benefit | 53 |  |  | (48 | )
Effect on postretirement benefit obligation | 1,452 |  |  | (1,306 | )
Schedule of Allocation of Plan Assets [Table Text Block] | The weighted-average asset allocation of our postretirement assets is as follows:
(Percent) |  | Actual Allocation
Asset Class | Current Policy Allocation |  | September 30 2012 | September 25 2011
Equity securities | 10-30 |  | 21 | 8
Debt securities | 70-90 |  | 75 | 85
Cash and cash equivalents | — |  | 2 | 7
Receivables, net | — |  | 2 | —
Schedule of Changes in Fair Value of Plan Assets [Table Text Block] | The fair value hierarchy of postretirement assets at September 30, 2012 is as follows:
(Thousands of Dollars) | Level 1 |  | Level 2 |  | Level 3 |
Cash and cash equivalents | 692 |  | — |  | — |
Receivables, net | 803 |  | — |  | — |
Domestic equity securities | 4,385 |  | 2,069 |  | — |
International equity securities | — |  | 671 |  | — |
Debt securities | — |  | 25,643 |  | — |
Schedule of Expected Benefit Payments [Table Text Block] | We anticipate future benefit payments to be paid either with future contributions to the plan or directly from plan assets, as follows:
(Thousands of Dollars) | Gross Payments |  |  | Less Medicare Part D Subsidy |  |  | Net Payments |
2013 | 3,280 |  |  | (220 | ) |  | 3,060 |
2014 | 3,080 |  |  | (230 | ) |  | 2,850 |
2015 | 2,980 |  |  | (230 | ) |  | 2,750 |
2016 | 2,960 |  |  | (230 | ) |  | 2,730 |
2017 | 2,900 |  |  | (230 | ) |  | 2,670 |
2018-2022 | 13,280 |  |  | (1,100 | ) |  | 12,180 |

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- Definition Tabular disclosure of accumulated benefit obligations and fair values of plan assets of pension plans and/or other employee benefit plans where the accumulated benefit obligation exceeds the fair value of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2417-114920 + Details
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- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the reconciliation of beginning and ending balances of the fair value of plan assets of pension plans and/or other employee benefit plans showing separately, if applicable, the effects during the period attributable to each of the following: actual return on plan assets, foreign currency exchange rate changes, contributions by the employer, contributions by plan participants, benefits paid, business combinations, divestitures, and settlements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 4, 7, 16, 20, 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=21916443&loc=d3e4179-114921 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2410-114920 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2439-114920 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5, 6, 7 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Tabular disclosure of the effect of a one-percentage-point increase and the effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs and the accumulated postretirement benefit obligation for health care benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (m) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the assumed health care cost trend rates for the next year used to measure the expected cost of benefits covered by the plans, including the ultimate trend rate(s) and when that rate is expected to be achieved. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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