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Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Oct. 03, 2020 | Sep. 28, 2019 | Sep. 29, 2018
Defined Benefit Plan Disclosure |  |  |
One-time pension settlement charge | $ 121,324 | $ 0 | $ 0
Profit share expense | 21,968 | 33,250 | $ 22,524
Pension Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Total accumulated benefit obligation | 868,316 | $ 1,235,230 |
Fair values of plan assets | 786,637 |  |
Estimated net prior service cost that will be amortized in next fiscal year | 6 |  |
Estimated net actuarial loss that will be amortized in next fiscal year | 19,261 |  |
Trust for Unqualified Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Estimated future employer contributions in next fiscal year | 5,200 |  |
Postretirement Benefit Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Postretirement healh care benefits - plan assets | $ 0 |  |
Discount rate | 2.30% | 3.00% | 4.20%
Service cost discount rate | 3.10% | 4.30% | 3.70%
Interest cost discount rate | 2.50% | 3.80% | 2.80%
Assumed annual per capita rate of increase of medical and drug costs for next fiscal year | 8.00% |  |
Defined benefit plan, ultimate trend rate | 4.50% |  |
Increase in accumulated postretirement benefit obligation due to one percentage point increase in heath care cost trend rate | $ 140 |  |
Decrease in accumulated postretirement benefit obligation due to one percentage point decrease in health care cost trend rate | $ 133 |  |
Class B Common Stock |  |  |
Defined Benefit Plan Disclosure |  |  |
Number of shares owned by the participants under RSP (in shares) | 1,519,892 |  |
U.S. Plans | Pension Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Pension settlement reduced projected benefit obligation | $ 486,615 | $ 0 |
Pension Settlement reduced fair value of assets | 486,615 | 0 |
One-time pension settlement charge | 121,324 |  |
Fair values of plan assets | $ 615,872 | $ 1,004,163 | $ 878,983
Assumptions for pension expense, average rate of return on plan assets | 4.50% | 5.30% | 7.00%
Postretirement healh care benefits - plan assets | $ 30,887 | $ 35,429 |
Discount rate | 3.00% | 3.30% | 4.30%
Service cost discount rate | 3.50% | 4.40% | 4.20%
Interest cost discount rate | 2.90% | 4.10% | 3.50%
U.S. Plans | Equity | Pension Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Actual Plan Asset Allocations | 37.00% | 18.00% |
U.S. Plans | Fixed income securities | Pension Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Actual Plan Asset Allocations |  | 82.00% |
Non-U.S. Plans | Pension Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Pension settlement reduced projected benefit obligation | $ 2,999 | $ 0 |
Pension Settlement reduced fair value of assets | 2,999 | 0 |
Fair values of plan assets | $ 170,765 | $ 166,242 | $ 145,641
Assumptions for pension expense, average rate of return on plan assets | 2.70% | 3.50% | 3.50%
Estimated future employer contributions in next fiscal year | $ 8,700 |  |
Postretirement healh care benefits - plan assets | $ 3,862 | $ 2,575 |
Discount rate | 1.40% | 1.60% | 2.80%
Service cost discount rate | 1.60% | 2.90% | 2.50%
Interest cost discount rate | 1.30% | 2.60% | 2.20%
Non-U.S. Plans | Equity | Pension Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Actual Plan Asset Allocations | 24.00% | 25.00% |
Assumptions for pension expense, assumed average asset allocation | 30.00% |  |
Non-U.S. Plans | Fixed income securities | Pension Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Assumptions for pension expense, assumed average asset allocation | 70.00% |  |

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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (s) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4587-114921 + Details
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