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Employee and Retiree Benefits (Tables) | 6 Months Ended
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Feb. 25, 2017
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) |  | February 25, 2017 |  | August 27, 2016
Postretirement health care benefit cost |  | $ | — |  |  | $ | 6,346 |
Non-qualified deferred compensation |  | 17,230 |  |  | 18,003 |
Executive share option plan liability |  | 2,468 |  |  | 3,341 |
SERP benefit liability |  | 2,723 |  |  | 2,681 |
Executive deferred compensation |  | 495 |  |  | 389 |
Officer stock-based compensation |  | 1,080 |  |  | 763 |
Total deferred compensation and postretirement health care benefits |  | 23,996 |  |  | 31,523 |
Less current portion |  | (4,626 | ) |  | (4,574 | )
Long-term deferred compensation and postretirement health care benefits |  | $ | 19,370 |  |  | $ | 26,949 |
Schedule of Postretirement Plan Amendments [Table Text Block] |
Date | Event |  | Dollar Cap Reduction | Liability Reduction (In thousands) | Amortization Period(1)
Fiscal 2005 | Established employer dollar caps |  |  | $ | 40,414 |  | 11.5 | years
January 2012 | Reduced employer dollar caps |  | 10% | 4,598 |  | 7.8 | years
January 2013 | Reduced employer dollar caps |  | 10% | 4,289 |  | 7.5 | years
January 2014 | Reduced employer dollar caps |  | 10% | 3,580 |  | 7.3 | years
January 2015 | Reduced employer dollar caps |  | 10% | 3,960 |  | 7.1 | years
January 2016 | Reduced employer dollar caps for retirees under age 65; discontinued retiree benefits for retirees age 65 and over |  | 10% | 28,596 |  | 6.9 | years
January 2017 (2) | Terminated plan |  |  | 6,338 |  | 0.2 | years
(1) Plan amendments were amortized on a straight-line basis over the expected remaining service period of active plan participants. (2) In accordance with ASC 715, the effects of the plan amendment are accounted for at the date the amendment is adopted and has been communicated to plan participants. The effective date for this plan amendment was October 26, 2016.
Schedule of Net Benefit Costs [Table Text Block] | Net periodic postretirement benefit income consisted of the following components:
|  | Three Months Ended |  | Six Months Ended
(In thousands) |  | February 25, 2017 |  | February 27, 2016 |  | February 25, 2017 |  | February 27, 2016
Interest cost |  | $ | — |  |  | $ | 58 |  |  | $ | 29 |  |  | $ | 211 |
Service cost |  | — |  |  | 23 |  |  | 16 |  |  | 63 |
Amortization of prior service benefit |  | (19,672 | ) |  | (2,008 | ) |  | (40,444 | ) |  | (3,720 | )
Amortization of net actuarial loss |  | 7,689 |  |  | 415 |  |  | 15,648 |  |  | 782 |
Net periodic postretirement benefit income |  | $ | (11,983 | ) |  | $ | (1,512 | ) |  | $ | (24,751 | ) |  | $ | (2,664 | )
Payments for postretirement health care |  | $ | 15 |  |  | $ | 278 |  |  | $ | 68 |  |  | $ | 506 |

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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=65897934&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + 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 (h) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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