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Employee and Retiree Benefits (Tables) | 12 Months Ended
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Aug. 29, 2015
Compensation and Retirement Disclosure [Abstract] |
Schedule of Amounts Recognized in Balance Sheet [Table Text Block] | Postretirement health care and deferred compensation benefits are as follows:
(In thousands) | August 29, 2015 |  | August 30, 2014
Postretirement health care benefit cost | $ | 34,535 |  |  | $ | 36,930 |
Non-qualified deferred compensation | 19,508 |  |  | 21,014 |
Executive share option plan liability | 4,788 |  |  | 5,628 |
SERP benefit liability | 2,649 |  |  | 2,974 |
Executive deferred compensation | 299 |  |  | 213 |
Officer stock-based compensation | 242 |  |  | 627 |
Total postretirement health care and deferred compensation benefits | 62,021 |  |  | 67,386 |
Less current portion(1) | (4,931 | ) |  | (4,575 | )
Long-term postretirement health care and deferred compensation benefits(2) | $ | 57,090 |  |  | $ | 62,811 |
Schedule of Postretirement Plan Amendments [Table Text Block] | As a result of these amendments, our liability for postretirement health care was reduced as presented in the following table.
Date |  | Plan Amendment |  | Dollar Cap Reduction |  | Liability Reduction (in thousands) |  | Amortization Period (1)
Fiscal 2005 |  | Established employer dollar cap |  |  |  | $ | 40,414 |  |  | 11.5 | years
January 2012 |  | Reduced employer dollar cap |  | 10% |  | 4,598 |  |  | 7.8 | years
January 2013 |  | Reduced employer dollar cap |  | 10% |  | 4,289 |  |  | 7.5 | years
January 2014 |  | Reduced employer dollar cap |  | 10% |  | 3,580 |  |  | 7.3 | years
January 2015 |  | Reduced employer dollar cap |  | 10% |  | 3,960 |  |  | 7.1 | years
(1) Plan amendments are amortized on a straight-line basis over the expected remaining service period of active plan participants.
Schedule of Defined Benefit Plans Disclosures [Table Text Block] | Changes in our postretirement health care liability are as follows:
(In thousands) | August 29, 2015 |  | August 30, 2014
Balance at beginning of year | $ | 36,930 |  |  | $ | 36,244 |
Interest cost | 1,382 |  |  | 1,540 |
Service cost | 427 |  |  | 393 |
Net benefits paid | (928 | ) |  | (1,035 | )
Actuarial loss | 684 |  |  | 3,368 |
Plan amendment | (3,960 | ) |  | (3,580 | )
Balance at end of year | $ | 34,535 |  |  | $ | 36,930 |
Schedule of Net Benefit Costs [Table Text Block] | Net periodic postretirement benefit income for the past three fiscal years consisted of the following components:
| Year Ended
(In thousands) | August 29, 2015 |  | August 30, 2014 |  | August 31, 2013
Interest cost | $ | 1,382 |  |  | $ | 1,540 |  |  | $ | 1,508 |
Service cost | 427 |  |  | 393 |  |  | 574 |
Amortization of prior service benefit | (5,538 | ) |  | (5,650 | ) |  | (5,170 | )
Amortization of net actuarial loss | 1,465 |  |  | 1,077 |  |  | 1,603 |
Net periodic postretirement benefit income | $ | (2,264 | ) |  | $ | (2,640 | ) |  | $ | (1,485 | )
Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block] | Amounts not yet recognized in net periodic benefit cost and included in accumulated other comprehensive income (before taxes) are as follows:
(In thousands) | August 29, 2015 |  | August 30, 2014
Prior service credit | $ | (13,279 | ) |  | $ | (14,857 | )
Net actuarial loss | 16,410 |  |  | 17,190 |
Accumulated other comprehensive income | $ | 3,131 |  |  | $ | 2,333 |
Schedule of Expected Benefit Payments [Table Text Block] | xpected future benefit payments for postretirement health care for the next ten years are as follows:
(In thousands) |  | Amount
Year: | 2016 |  | $ | 980 |
| 2017 |  | 541 |
| 2018 |  | 369 |
| 2019 |  | 413 |
| 2020 |  | 453 |
| 2021 - 2025 |  | 2,349 |
| Total |  | $ | 5,105 |
Investment in Life Insurance [Table Text Block] | To assist in funding the deferred compensation and SERP liabilities, we have invested in COLI policies. The cash surrender value of these policies is presented as investment in life insurance in the accompanying balance sheets and consists of the following:
(In thousands) | August 29, 2015 |  | August 30, 2014
Cash value | $ | 58,501 |  |  | $ | 55,982 |
Borrowings | (32,329 | ) |  | (30,856 | )
Investment in life insurance | $ | 26,172 |  |  | $ | 25,126 |

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