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Pension and Other Benefit Programs (Tables)
 12 Months Ended
Oct. 03, 2020
Retirement Benefits [Abstract]  
Benefit Obligations, Assets, Funded Status and Balance Sheet Impacts Associated with Pension and Postretirement Medical Benefit Plans based upon Actuarial Valuations
The following chart summarizes the benefit obligations, assets, funded status and balance sheet impacts associated with the defined benefit pension and postretirement medical benefit plans:
 Pension PlansPostretirement Medical Plans
 October 3,
2020		September 28,
2019		October 3,
2020		September 28,
2019
Projected benefit obligations
Beginning obligations$(18,531) $(14,500) $(1,946) $(1,609) 
Acquisition of TFCF—  (759) —  (65) 
Service cost(410) (345) (10) (8) 
Interest cost(527) (592) (56) (67) 
Actuarial loss(1)
(1,958) (2,923) (127) (234) 
Plan amendments and other1  32  (12) (11) 
Benefits paid662  534  47  48  
Curtailments3  22  —  —  
Ending obligations$(20,760) $(18,531) $(2,104) $(1,946) 
Fair value of plans’ assets
Beginning fair value$14,878  $12,728  $762  $731  
Acquisition of TFCF—  587  —  —  
Actual return on plan assets770  690  38  33  
Contributions664  1,461  9  37  
Benefits paid(662) (534) (47) (48) 
Expenses and other(52) (54) 9  9  
Ending fair value$15,598  $14,878  $771  $762  
Underfunded status of the plans$(5,162) $(3,653) $(1,333) $(1,184) 
Amounts recognized in the balance sheet
Non-current assets$20  $5  $—  $—  
Current liabilities(59) (54) (5) (5) 
Non-current liabilities(5,123) (3,604) (1,328) (1,179) 
$(5,162) $(3,653) $(1,333) $(1,184) 
(1)The actuarial loss for both fiscal 2020 and 2019 was primarily due to a reduction in the discount rate from the rate that was used in the preceding fiscal year.
Net Periodic Benefit Cost
The components of net periodic benefit cost are as follows:
 Pension PlansPostretirement Medical Plans
 202020192018202020192018
Service cost$410  $345  $350  $10  $8  $10  
Other costs (benefits):
Interest cost527  592  489  56  67  60  
Expected return on plan assets(1,084) (978) (901) (57) (56) (53) 
Amortization of prior-year service costs13  13  13  —  —  —  
Recognized net actuarial loss 544  260  348  14  —  14  
Total other costs (benefits)—  (113) (51) 13  11  21  
Net periodic benefit cost$410  $232  $299  $23  $19  $31  
Key Assumptions
Key assumptions are as follows:
 Pension PlansPostretirement Medical Plans
 202020192018202020192018
Discount rate used to determine the fiscal year‑end benefit obligation2.82 %3.22 %4.31 %2.80 %3.22 %4.31 %
Discount rate used to determine the interest cost component of net periodic benefit cost2.94 %4.09 %3.46 %2.95 %4.10 %3.49 %
Rate of return on plan assets7.00 %7.25 %7.50 %7.00 %7.25 %7.50 %
Weighted average rate of compensation increase to determine the fiscal year‑end benefit obligation3.20 %3.20 %3.20 %n/an/an/a
Year 1 increase in cost of benefitsn/an/an/a7.00 %7.00 %7.00 %
Rate of increase to which the cost of benefits is assumed to decline (the ultimate trend rate)n/an/an/a4.25 %4.25 %4.25 %
Year that the rate reaches the ultimate trend raten/an/an/a2034 2033 2032
Accumulated Other Comprehensive Loss, Before Tax, Not yet Recognized in Net Periodic Benefit Cost
AOCI, before tax, as of October 3, 2020 consists of the following amounts that have not yet been recognized in net periodic benefit cost:
Pension PlansPostretirement
Medical Plans		Total
Prior service cost$27  $—  $27  
Net actuarial loss8,915  429  9,344  
Total amounts included in AOCI8,942  429  9,371  
Prepaid (accrued) pension cost(3,780) 904  (2,876) 
Net balance sheet liability$5,162  $1,333  $6,495  
Plan Assets Investment Policy Ranges for Major Asset Classes The investment policy ranges for the major asset classes are as follows:
Asset ClassMinimumMaximum
Equity investments30%60%
Fixed income investments20%40%
Alternative investments10%30%
Cash & money market funds—%10%
Defined Benefit Plan Assets Measured at Fair Value
The Company’s defined benefit plan assets are summarized by level in the following tables:
As of October 3, 2020
DescriptionLevel 1Level 2TotalPlan Asset Mix
Cash$207  $—  $207  1%
Common and preferred stocks(1)
3,308  —  3,308  20%
Mutual funds1,154  —  1,154  7%
Government and federal agency bonds, notes and MBS
2,326  354  2,680  16%
Corporate bonds
—  935  935  6%
Other mortgage- and asset-backed securities—  106  106  1%
Derivatives and other, net
(2) 7  5  —%
Total investments in the fair value hierarchy $6,993  $1,402  $8,395  
Assets valued at NAV as a practical expedient:
Common collective funds
3,993  24%
Alternative investments3,375  21%
Money market funds and other606  4%
Total investments at fair value$16,369  100%

As of September 28, 2019
DescriptionLevel 1Level 2TotalPlan Asset Mix
Cash$197  $—  $197  1%
Common and preferred stocks(1)
3,468  —  3,468  22%
Mutual funds1,140  —  1,140  7%
Government and federal agency bonds, notes and MBS
2,042  404  2,446  16%
Corporate bonds
—  580  580  4%
Other mortgage- and asset-backed securities—  127  127  1%
Derivatives and other, net
(6) (21) (27) —%
Total investments in the fair value hierarchy $6,841  $1,090  $7,931  
Assets valued at NAV as a practical expedient:
Common collective funds
3,691  24%
Alternative investments2,725  17%
Money market funds and other1,293  8%
Total investments at fair value$15,640  100%
(1)Includes 2.9 million shares of Company common stock valued at $355 million (2% of total plan assets) and 2.9 million shares valued at $373 million (2% of total plan assets) at October 3, 2020 and September 28, 2019, respectively.
Estimated Future Benefit Payments
The following table presents estimated future benefit payments for the next ten fiscal years:
Pension
Plans
Postretirement
Medical Plans(1)
2021$678$59
202266163
202369167
202472972
202577176
2026 – 20304,433446
(1)Estimated future benefit payments are net of expected Medicare subsidy receipts of $85 million
Long Term Rates of Return by Asset Class The following long-term rates of return by asset class were considered in setting the long-term rate of return on plan assets assumption:
Equity Securities6 %to10 %
Debt Securities2 %to4 %
Alternative Investments6 %to11 %
One Percentage Point (ppt) Change on Projected Benefit Obligations A one percentage point (ppt) change in the discount rate and expected long-term rate of return on plan assets would have the following effects on the projected benefit obligations for pension and postretirement medical plans as of October 3, 2020 and on cost for fiscal 2021:
 Discount RateExpected Long-Term
Rate of Return On Assets
Increase (decrease)Benefit
Expense		Projected Benefit ObligationsBenefit
Expense
1 ppt decrease$351  $3,988  $164  
1 ppt increase(303) (3,380) (164) 
Contribution into Multiemployer Pension Plans and Health and Welfare Plans
The following table sets forth our contributions to multiemployer pension and health and welfare benefit plans:
202020192018
Pension plans$221$189$144
Health & welfare plans217218172
Total contributions$438$407$316