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Employee Benefit Plans (Narrative) (Details) $ in Thousands | 12 Months Ended
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Oct. 03, 2015 USD ($) shares | Sep. 27, 2014 USD ($) | Sep. 28, 2013 USD ($)
Employee Benefit Plans |  |  |
Percentage match of eligible compensation contributed to investment selection | 25.00% |  |
Percentage of eligible compensation contributed to investment selection for which matching contribution is made | 2.00% |  |
Total accumulated benefit obligation | $ 941,266 | $ 877,846 |
Fair values of plan assets total | $ 696,476 |  |
Number of plans | 3 | 3 |
Fair value of plan assets exceeding accumulated benefit obligations | $ 634,406 | $ 627,788 |
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation | $ 886,663 | 810,424 |
Defined benefit plan, ultimate trend rate | 4.50% |  |
Defined benefit plan, year of ultimate trend rate | 2028 |  |
Increase in accumulated postretirement benefit obligation due to one percentage point increase in heath care cost trend rate | $ 384 |  |
Decrease in accumulated postretirement benefit obligation due to one percentage point decrease in health care cost trend rate | 359 |  |
Profit share expense | 13,188 | 22,030 | $ 14,950
U.S. Pension Plans |  |  |
Employee Benefit Plans |  |  |
Defined Benefit Plan, Estimated future employer contributions in next fiscal year | 68,000 |  |
Fair values of plan assets total | $ 578,783 | $ 585,677 |
Assumptions for pension expense, average rate of return on plan assets | 8.00% | 8.40% | 8.60%
Assumptions for benefit obligations, Discount rate | 4.50% | 4.40% | 5.00%
Assumptions for net periodic benefit cost, Discount rate | 4.40% | 5.00% | 3.70%
Non-U.S. Pension Plans |  |  |
Employee Benefit Plans |  |  |
Defined Benefit Plan, Estimated future employer contributions in next fiscal year | $ 6,700 |  |
Fair values of plan assets total | $ 117,693 | $ 120,754 |
Assumptions for pension expense, average rate of return on plan assets | 4.50% | 4.10% | 4.50%
Assumptions for benefit obligations, Discount rate | 3.00% | 3.10% | 3.60%
Assumptions for net periodic benefit cost, Discount rate | 3.10% | 3.70% | 4.00%
Postretirement Benefit Plan |  |  |
Employee Benefit Plans |  |  |
Defined Benefit Plan, Assets for Plan Benefits | $ 0 |  |
Assumptions for benefit obligations, Discount rate | 3.90% | 3.90% | 4.50%
Assumptions for net periodic benefit cost, Discount rate | 4.50% | 4.50% | 3.30%
Three Plans |  |  |
Employee Benefit Plans |  |  |
Fair value of plan assets exceeding accumulated benefit obligations | $ 62,070 | $ 78,643 |
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation | 54,603 | 67,423 |
Defined Benefit Pension |  |  |
Employee Benefit Plans |  |  |
Estimated net prior service cost that will be amortized in next fiscal year | 111 |  |
Estimated net actuarial loss that will be amortized in next fiscal year | $ 28,778 |  |
Medical And Drug Costs Before Age Sixty Five |  |  |
Employee Benefit Plans |  |  |
Assumed annual per capita rate of increase of medical and drug costs for next fiscal year | 7.00% |  |
Medical Costs After Age Sixty Five |  |  |
Employee Benefit Plans |  |  |
Assumed annual per capita rate of increase of medical and drug costs for next fiscal year | 6.70% |  |
Drug Costs After Age Sixty Five |  |  |
Employee Benefit Plans |  |  |
Assumed annual per capita rate of increase of medical and drug costs for next fiscal year | 7.20% |  |
Class A Common Stock |  |  |
Employee Benefit Plans |  |  |
Number of shares owned by the participants under RSP | shares | 459,928 |  |
Class A Common Stock | U.S. Pension Plans |  |  |
Employee Benefit Plans |  |  |
Number of stock included in plan assets | shares | 149,022 |  |
Class B Common Stock |  |  |
Employee Benefit Plans |  |  |
Number of shares owned by the participants under RSP | shares | 1,465,324 |  |
Class B Common Stock | U.S. Pension Plans |  |  |
Employee Benefit Plans |  |  |
Number of stock included in plan assets | shares | 1,001,034 |  |
Equity Securities | U.S. Pension Plans |  |  |
Employee Benefit Plans |  |  |
Defined Benefit Plan, Target Plan Asset Allocations | 60.00% |  |
Equity Securities | Non-U.S. Pension Plans |  |  |
Employee Benefit Plans |  |  |
Defined Benefit Plan, Target Plan Asset Allocations | 40.00% |  |
Fixed Income Securities | U.S. Pension Plans |  |  |
Employee Benefit Plans |  |  |
Defined Benefit Plan, Target Plan Asset Allocations | 30.00% |  |
Fixed Income Securities | Non-U.S. Pension Plans |  |  |
Employee Benefit Plans |  |  |
Defined Benefit Plan, Target Plan Asset Allocations | 60.00% |  |
Real estate and Other securities | U.S. Pension Plans |  |  |
Employee Benefit Plans |  |  |
Defined Benefit Plan, Target Plan Asset Allocations | 10.00% |  |
Limited Partnerships | U.S. Pension Plans |  |  |
Employee Benefit Plans |  |  |
Fair values of plan assets total | $ 64,760 | 81,342 |
Interest In Common Collective Trusts | U.S. Pension Plans |  |  |
Employee Benefit Plans |  |  |
Fair values of plan assets total | 88,870 | 153,183 |
U.S. Pension Plans |  |  |
Employee Benefit Plans |  |  |
Defined Contribution Plan, Cost Recognized | 13,621 | 13,196 | $ 11,223
Non-U.S. Pension Plans |  |  |
Employee Benefit Plans |  |  |
Defined Contribution Plan, Cost Recognized | $ 6,570 | $ 6,458 | $ 5,672

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- Definition For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Accumulated Benefit Obligation -URI http://asc.fasb.org/extlink&oid=6503844 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Expected Long-Term Rate of Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512046 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930 Reference 2: 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=58740216&loc=d3e1928-114920 + Details
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- Definition The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Health Care Cost Trend Rate -URI http://asc.fasb.org/extlink&oid=6514820 Reference 2: 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=58740216&loc=d3e1928-114920 + Details
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- Definition If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented. + References Reference 1: 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=58242635&loc=d3e4179-114921 Reference 2: 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=58740216&loc=d3e2417-114920 + Details
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