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Pension, Retiree Medical and Savings Plans (Tables)
 12 Months Ended
Dec. 30, 2023
Defined Benefit Plan Disclosure [Line Items]  
Schedule Of Plan Assets Measured At Fair Value Table Text Block
Plan assets measured at fair value as of year-end 2023 and 2022 are categorized consistently by Level 1 (quoted prices in active markets for identical assets), Level 2 (significant other observable inputs) and Level 3 (significant unobservable inputs) in both years and are as follows:
 Fair Value Hierarchy Level20232022
U.S. plan assets (a)
Equity securities, including preferred stock (b)
1$4,698 $4,387 
Government securities (c)
21,812 1,751 
Corporate bonds (c)
24,233 4,245 
Mortgage-backed securities (c)
2133 142 
Contracts with insurance companies (d)
31 9 
Cash and cash equivalents (e)
1, 2349 157 
Sub-total U.S. plan assets11,226 10,691 
Real estate commingled funds measured at net asset value (f)
411 533 
Dividends and interest receivable, net of payables
87 120 
Total U.S. plan assets$11,724 $11,344 
International plan assets
Equity securities (b)
1$1,175 $1,291 
Government securities (c)
21,207 736 
Corporate bonds (c)
2267 254 
Fixed income commingled funds (g)
1526 628 
Contracts with insurance companies (d)
330 27 
Cash and cash equivalents1143 75 
Sub-total international plan assets3,348 3,011 
Real estate commingled funds measured at net asset value (f)
162 173 
Dividends and interest receivable18 11 
Total international plan assets$3,528 $3,195 
(a)Includes $183 million and $196 million in 2023 and 2022, respectively, of retiree medical plan assets that are restricted for purposes of providing health benefits for U.S. retirees and their beneficiaries.
(b)Invested in U.S. and international common stock and commingled funds, and the preferred stock portfolio was invested in domestic and international corporate preferred stock investments. The common and preferred stock investments are based on quoted prices in active markets. The commingled funds are based on the published price of the fund and include one large-cap fund that represents 13% and 10% of total U.S. plan assets for 2023 and 2022, respectively.
(c)These investments are based on quoted bid prices for comparable securities in the marketplace and broker/dealer quotes in active markets. Corporate bonds of U.S.-based companies represents 31% and 32% of total U.S. plan assets for 2023 and 2022, respectively.
(d)Based on the fair value of the contracts as determined by the insurance companies using inputs that are not observable. The changes in Level 3 amounts were not significant in the years ended December 30, 2023 and December 31, 2022.
(e)Includes Level 1 assets of $3 million for 2023 and Level 2 assets of $346 million and $157 million for 2023 and 2022, respectively.
(f)The real estate commingled funds include investments in limited partnerships. These funds are based on the net asset value of the appraised value of investments owned by these funds as determined by independent third parties using inputs that are not observable. The majority of the funds are redeemable quarterly subject to availability of cash and have notice periods ranging from 45 to 90 days.
(g)Based on the published price of the fund.
Selected Financial Information For Pension And Retiree Medical Plans
Selected financial information for our pension and retiree medical plans is as follows: 
 PensionRetiree Medical
 U.S.International  
 202320222023202220232022
Change in projected benefit obligation
Obligation at beginning of year$11,543 $16,216 $2,603 $4,175 $714 $954 
Service cost327 487 43 64 29 37 
Interest cost593 434 141 90 36 19 
Plan amendments13 10 — — — — 
Participant contributions— — 2 2 — — 
Experience loss/(gain)603 (3,989)194 (1,284)(22)(198)
Benefit payments(1,006)(412)(116)(127)(80)(81)
Settlement/curtailment (36)(1,109)(26)(5)— (14)
Special termination benefits(1)37 — — — — 
Other, including foreign currency adjustment(1)(131)145 (312)— (3)
Obligation at end of year$12,035 $11,543 $2,986 $2,603 $677 $714 
Change in fair value of plan assets
Fair value at beginning of year$11,148 $15,904 $3,195 $4,624 $196 $299 
Actual return on plan assets1,121 (3,337)267 (1,026)21 (68)
Employer contributions/funding314 235 50 101 46 48 
Participant contributions— — 2 2 — — 
Benefit payments(1,006)(412)(116)(127)(80)(81)
Settlement(36)(1,117)(26)(5)— — 
Other, including foreign currency adjustment— (125)156 (374)— (2)
Fair value at end of year$11,541 $11,148 $3,528 $3,195 $183 $196 
Funded status$(494)$(395)$542 $592 $(494)$(518)
Amounts recognized
Other assets$313 $225 $727 $708 $— $— 
Other current liabilities(75)(56)(11)(7)(52)(54)
Other liabilities(732)(564)(174)(109)(442)(464)
Net amount recognized$(494)$(395)$542 $592 $(494)$(518)
Amounts included in accumulated other comprehensive loss (pre-tax)
Net loss/(gain)$3,596 $3,337 $707 $571 $(323)$(320)
Prior service cost/(credit)18 (21)(8)(9)(19)(25)
Total$3,614 $3,316 $699 $562 $(342)$(345)
Changes recognized in net (gain)/loss included in other comprehensive loss
Net loss/(gain) arising in current year$333 $254 $119 $(40)$(30)$(114)
Amortization and settlement recognition(74)(467)(23)(30)27 14 
Foreign currency translation loss/(gain)— — 40 (55)— — 
Total$259 $(213)$136 $(125)$(3)$(100)
Accumulated benefit obligation at end of year$11,653 $11,104 $2,835 $2,483 
Schedule of Net Benefit Costs [Table Text Block]
The components of total pension and retiree medical benefit costs are as follows:
 PensionRetiree Medical
 U.S.International   
 202320222021202320222021202320222021
Service cost$327 $487 $518 $43 $64 $104 $29 $37 $33 
Other pension and retiree medical benefits (income)/expense:
Interest cost$593 $434 $324 $141 $90 $74 $36 $19 $15 
Expected return on plan assets(851)(912)(970)(192)(218)(231)(13)(16)(15)
Amortization of prior service credits(26)(28)(31)(1)(1)(2)(6)(8)(11)
Amortization of net losses/(gains)70 149 224 13 29 77 (27)(14)(14)
Settlement/curtailment losses/(gains) (a)
4 322 40 10 1 (11)— (16)— 
Special termination benefits(1)37 9 — — — — — — 
Total other pension and retiree medical benefits (income)/expense$(211)$2 $(404)$(29)$(99)$(93)$(10)$(35)$(25)
Total$116 $489 $114 $14 $(35)$11 $19 $2 $8 
(a)In 2022, U.S. includes a settlement charge of $318 million ($246 million after-tax or $0.18 per share) related to lump sum distributions exceeding the total of annual service and interest cost.
Weighted-Average Assumptions Used To Determine Projected Benefit Liability And Benefit Expense For Pension And Retiree Medical Plans
The following table provides the weighted-average assumptions used to determine net periodic benefit cost and projected benefit obligation for our pension and retiree medical plans:
 PensionRetiree Medical
 U.S.International   
 202320222021202320222021202320222021
Net Periodic Benefit Cost
Service cost discount rate (a)
5.4 %3.1 %2.6 %7.0 %4.2 %2.7 %5.4 %2.8 %2.3 %
Interest cost discount rate (a)
5.4 %3.1 %2.0 %5.4 %2.3 %1.7 %5.3 %2.1 %1.6 %
Expected return on plan assets (a)
7.4 %6.7 %6.4 %5.7 %5.3 %5.3 %7.1 %5.7 %5.4 %
Rate of salary increases3.2 %3.0 %3.0 %4.2 %3.3 %3.3 %
Projected Benefit Obligation
Discount rate5.1 %5.4 %2.9 %5.1 %5.3 %2.4 %5.1 %5.4 %2.7 %
Rate of salary increases3.9 %3.2 %3.0 %4.3 %4.2 %3.3 %
(a)2022 U.S. rates reflect remeasurement of a U.S. qualified defined benefit pension plan in the second quarter of 2022.
Future Benefit Payments
Our estimated future benefit payments are as follows:
202420252026202720282029 - 2033
Pension$1,102 $925 $964 $996 $1,023 $5,403 
Retiree medical (a)
$81 $80 $76 $74 $70 $309 
(a)Expected future benefit payments for our retiree medical plans do not reflect any estimated subsidies expected to be received under the 2003 Medicare Act. Subsidies are expected to be approximately $1 million for each of the years from 2024 through 2028 and approximately $2 million in total for 2029 through 2033.
Target Investment Allocation
For 2024 and 2023, our expected long-term rate of return on U.S. plan assets is 7.4%. Our target investment allocations for U.S. plan assets are as follows:
20242023
Fixed income55 %56 %
U.S. equity22 %22 %
International equity19 %18 %
Real estate4 %4 %
Effects Of 1-Percentage-Point Change In The Assumed Health Care Trend Rate
Retiree Medical Cost Trend Rates
The assumed health care cost trend rates are as follows:
20242023
Average increase assumed5 %6 %
Ultimate projected increase 4 %4 %
Year of ultimate projected increase
20462046
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets
The following table provides selected information about plans with accumulated benefit obligation and total projected benefit obligation in excess of plan assets:
 PensionRetiree Medical
 U.S.International  
 202320222023202220232022
Selected information for plans with accumulated benefit obligation in excess of plan assets
Obligation for service to date$(631)$(584)$(255)$(158)
Fair value of plan assets$— $— $190 $129 
Selected information for plans with projected benefit obligation in excess of plan assets
Benefit obligation$(8,223)$(620)$(375)$(273)$(677)$(714)
Fair value of plan assets$7,416 $— $190 $157 $183 $196 
Employer Contributions
Contributions to our pension and retiree medical plans were as follows:
PensionRetiree Medical
202320222021202320222021
Discretionary (a)
$267 $160 $525 $— $— $— 
Non-discretionary97 176 213 46 48 47 
Total$364 $336 $738 $46 $48 $47 
(a)Includes $250 million contribution in 2023, $150 million contribution in 2022 and $500 million contribution in 2021 to fund our U.S. qualified defined benefit plans.