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Pension, Retiree Medical and Savings Plans (Tables) | 12 Months Ended
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Dec. 26, 2020
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 2020 and 2019 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 Level |  | 2020 |  | 2019
U.S. plan assets (a) |  |  |  |  |
Equity securities, including preferred stock (b) | 1 |  | $ | 7,179 |  |  | $ | 6,605 |
Government securities (c) | 2 |  | 2,177 |  |  | 2,154 |
Corporate bonds (c) | 2 |  | 5,437 |  |  | 4,737 |
Mortgage-backed securities (c) | 2 |  | 119 |  |  | 159 |
Contracts with insurance companies (d) | 3 |  | 9 |  |  | 9 |
Cash and cash equivalents (e) | 1, 2 |  | 278 |  |  | 275 |
Sub-total U.S. plan assets |  |  | 15,199 |  |  | 13,939 |
Real estate commingled funds measured at net asset value (f) |  |  | 517 |  |  | 605 |
Dividends and interest receivable, net of payables |  |  | 64 |  |  | 60 |
Total U.S. plan assets |  |  | $ | 15,780 |  |  | $ | 14,604 |
International plan assets |  |  |  |  |
Equity securities (b) | 1, 2 |  | $ | 2,119 |  |  | $ | 1,973 |
Government securities (c) | 2 |  | 937 |  |  | 725 |
Corporate bonds (c) | 2 |  | 445 |  |  | 331 |
Fixed income commingled funds (g) | 1 |  | 509 |  |  | 437 |
Contracts with insurance companies (d) | 3 |  | 50 |  |  | 42 |
Cash and cash equivalents | 1 |  | 33 |  |  | 24 |
Sub-total international plan assets |  |  | 4,093 |  |  | 3,532 |
Real estate commingled funds measured at net asset value (f) |  |  | 202 |  |  | 193 |
Dividends and interest receivable |  |  | 8 |  |  | 7 |
Total international plan assets |  |  | $ | 4,303 |  |  | $ | 3,732 |
(a)Includes $315 million and $302 million in 2020 and 2019, 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 stock is 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 16% of total U.S. plan assets for 2020 and 2019, respectively. The preferred stock investments are based on quoted bid prices for comparable securities in the marketplace and broker/dealer quotes in active markets. The international portfolio includes Level 1 assets of $2,119 million and $1,941 million for 2020 and 2019, respectively, and Level 2 assets of $32 million for 2019. (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 represent 30% and 28% of total U.S. plan assets for 2020 and 2019, 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 26, 2020 and December 28, 2019. (e)Cash and cash equivalents in the U.S. includes Level 1 assets of $178 million and $159 million for 2020 and 2019, respectively, and Level 2 assets of $100 million and $116 million for 2020 and 2019, 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:
| Pension |  | Retiree Medical
| U.S. |  | International |  |  |  |
| 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Change in projected benefit obligation |  |  |  |  |  |  |  |  |  |  |
Obligation at beginning of year | $ | 15,230 |  |  | $ | 13,807 |  |  | $ | 3,753 |  |  | $ | 3,098 |  |  | $ | 988 |  |  | $ | 996 |
Service cost | 434 |  |  | 381 |  |  | 86 |  |  | 73 |  |  | 25 |  |  | 23 |
Interest cost | 435 |  |  | 543 |  |  | 85 |  |  | 97 |  |  | 25 |  |  | 36 |
Plan amendments | (221) |  |  | 15 |  |  | (17) |  |  | 1 |  |  | (25) |  |  | — |
Participant contributions | — |  |  | — |  |  | 2 |  |  | 2 |  |  | — |  |  | — |
Experience loss | 2,042 |  |  | 2,091 |  |  | 467 |  |  | 515 |  |  | 81 |  |  | 36 |
Benefit payments | (378) |  |  | (341) |  |  | (92) |  |  | (100) |  |  | (89) |  |  | (105) |
Settlement/curtailment | (808) |  |  | (1,268) |  |  | (24) |  |  | (31) |  |  | — |  |  | — |
Special termination benefits | 19 |  |  | 2 |  |  | — |  |  | — |  |  | — |  |  | — |
Other, including foreign currency adjustment | — |  |  | — |  |  | 170 |  |  | 98 |  |  | 1 |  |  | 2 |
Obligation at end of year | $ | 16,753 |  |  | $ | 15,230 |  |  | $ | 4,430 |  |  | $ | 3,753 |  |  | $ | 1,006 |  |  | $ | 988 |
Change in fair value of plan assets |  |  |  |  |  |  |  |  |  |  |
Fair value at beginning of year | $ | 14,302 |  |  | $ | 12,258 |  |  | $ | 3,732 |  |  | $ | 3,090 |  |  | $ | 302 |  |  | $ | 285 |
Actual return on plan assets | 1,908 |  |  | 3,101 |  |  | 401 |  |  | 551 |  |  | 47 |  |  | 78 |
Employer contributions/funding | 387 |  |  | 550 |  |  | 120 |  |  | 122 |  |  | 55 |  |  | 44 |
Participant contributions | — |  |  | — |  |  | 2 |  |  | 2 |  |  | — |  |  | — |
Benefit payments | (378) |  |  | (341) |  |  | (92) |  |  | (100) |  |  | (89) |  |  | (105) |
Settlement | (754) |  |  | (1,266) |  |  | (29) |  |  | (31) |  |  | — |  |  | — |
Other, including foreign currency adjustment | — |  |  | — |  |  | 169 |  |  | 98 |  |  | — |  |  | — |
Fair value at end of year | $ | 15,465 |  |  | $ | 14,302 |  |  | $ | 4,303 |  |  | $ | 3,732 |  |  | $ | 315 |  |  | $ | 302 |
Funded status | $ | (1,288) |  |  | $ | (928) |  |  | $ | (127) |  |  | $ | (21) |  |  | $ | (691) |  |  | $ | (686) |
Amounts recognized |  |  |  |  |  |  |  |  |  |  |
Other assets | $ | 797 |  |  | $ | 744 |  |  | $ | 110 |  |  | $ | 99 |  |  | $ | — |  |  | $ | — |
Other current liabilities | (53) |  |  | (52) |  |  | (1) |  |  | (1) |  |  | (51) |  |  | (58) |
Other liabilities | (2,032) |  |  | (1,620) |  |  | (236) |  |  | (119) |  |  | (640) |  |  | (628) |
Net amount recognized | $ | (1,288) |  |  | $ | (928) |  |  | $ | (127) |  |  | $ | (21) |  |  | $ | (691) |  |  | $ | (686) |
Amounts included in accumulated other comprehensive loss (pre-tax) |  |  |  |  |  |  |  |
Net loss/(gain) | $ | 4,116 |  |  | $ | 3,516 |  |  | $ | 1,149 |  |  | $ | 914 |  |  | $ | (212) |  |  | $ | (285) |
Prior service (credit)/cost | (119) |  |  | 114 |  |  | (19) |  |  | — |  |  | (45) |  |  | (32) |
Total | $ | 3,997 |  |  | $ | 3,630 |  |  | $ | 1,130 |  |  | $ | 914 |  |  | $ | (257) |  |  | $ | (317) |
Changes recognized in net loss/(gain) included in other comprehensive loss |  |
Net loss/(gain) arising in current year | $ | 1,009 |  |  | $ | (120) |  |  | $ | 268 |  |  | $ | 152 |  |  | $ | 50 |  |  | $ | (24) |
Amortization and settlement recognition | (409) |  |  | (457) |  |  | (75) |  |  | (44) |  |  | 23 |  |  | 27 |
Foreign currency translation loss/(gain) | — |  |  | — |  |  | 42 |  |  | 26 |  |  | — |  |  | (1) |
Total | $ | 600 |  |  | $ | (577) |  |  | $ | 235 |  |  | $ | 134 |  |  | $ | 73 |  |  | $ | 2 |
Accumulated benefit obligation at end of year | $ | 15,949 |  |  | $ | 14,255 |  |  | $ | 4,108 |  |  | $ | 3,441 |  |  |  |  |
Schedule of Net Benefit Costs [Table Text Block] | The components of total pension and retiree medical benefit costs are as follows:
| Pension |  | Retiree Medical
| U.S. |  | International |  |  |  |  |  |
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Service cost | $ | 434 |  |  | $ | 381 |  |  | $ | 431 |  |  | $ | 86 |  |  | $ | 73 |  |  | $ | 92 |  |  | $ | 25 |  |  | $ | 23 |  |  | $ | 32 |
Other pension and retiree medical benefits (income)/expense: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest cost | $ | 435 |  |  | $ | 543 |  |  | $ | 482 |  |  | $ | 85 |  |  | $ | 97 |  |  | $ | 93 |  |  | $ | 25 |  |  | $ | 36 |  |  | $ | 34 |
Expected return on plan assets | (929) |  |  | (892) |  |  | (943) |  |  | (202) |  |  | (188) |  |  | (197) |  |  | (16) |  |  | (18) |  |  | (19) |
Amortization of prior service cost/(credits) | 12 |  |  | 10 |  |  | 3 |  |  | — |  |  | — |  |  | — |  |  | (12) |  |  | (19) |  |  | (20) |
Amortization of net losses/(gains) | 196 |  |  | 161 |  |  | 179 |  |  | 61 |  |  | 32 |  |  | 45 |  |  | (23) |  |  | (27) |  |  | (8) |
Settlement/curtailment losses (a) | 213 |  |  | 296 |  |  | 8 |  |  | 19 |  |  | 12 |  |  | 6 |  |  | — |  |  | — |  |  | — |
Special termination benefits | 19 |  |  | 1 |  |  | 36 |  |  | — |  |  | — |  |  | 2 |  |  | — |  |  | — |  |  | 1 |
Total other pension and retiree medical benefits (income)/expense | $ | (54) |  |  | $ | 119 |  |  | $ | (235) |  |  | $ | (37) |  |  | $ | (47) |  |  | $ | (51) |  |  | $ | (26) |  |  | $ | (28) |  |  | $ | (12) |
Total | $ | 380 |  |  | $ | 500 |  |  | $ | 196 |  |  | $ | 49 |  |  | $ | 26 |  |  | $ | 41 |  |  | $ | (1) |  |  | $ | (5) |  |  | $ | 20 |
(a)In 2020, U.S. includes a settlement charge of $205 million ($158 million after-tax or $0.11 per share) related to lump sum distributions exceeding the total of annual service and interest cost. In 2019, U.S. includes settlement charges related to the purchase of a group annuity contract of $220 million ($170 million after-tax or $0.12 per share) and a pension lump sum settlement charge of $53 million ($41 million after-tax or $0.03 per share).
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:
| Pension |  | Retiree Medical
| U.S. |  | International |  |  |  |  |  |
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Net Periodic Benefit Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost discount rate | 3.4 | % |  | 4.4 | % |  | 3.8 | % |  | 3.2 | % |  | 4.2 | % |  | 3.5 | % |  | 3.2 | % |  | 4.3 | % |  | 3.6 | %
Interest cost discount rate | 2.9 | % |  | 4.1 | % |  | 3.4 | % |  | 2.4 | % |  | 3.2 | % |  | 2.8 | % |  | 2.6 | % |  | 3.8 | % |  | 3.0 | %
Expected return on plan assets | 6.8 | % |  | 7.1 | % |  | 7.2 | % |  | 5.6 | % |  | 5.8 | % |  | 6.0 | % |  | 5.8 | % |  | 6.6 | % |  | 6.5 | %
Rate of salary increases | 3.1 | % |  | 3.1 | % |  | 3.1 | % |  | 3.3 | % |  | 3.7 | % |  | 3.7 | % |  |  |  |  |  |
Projected Benefit Obligation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate | 2.5 | % |  | 3.3 | % |  | 4.4 | % |  | 2.0 | % |  | 2.5 | % |  | 3.4 | % |  | 2.3 | % |  | 3.1 | % |  | 4.2 | %
Rate of salary increases | 3.0 | % |  | 3.1 | % |  | 3.1 | % |  | 3.3 | % |  | 3.3 | % |  | 3.7 | % |  |  |  |  |  |
Future Benefit Payments | Our estimated future benefit payments are as follows:
| 2021 |  | 2022 |  | 2023 |  | 2024 |  | 2025 |  | 2026 - 2030
Pension | $ | 925 |  |  | $ | 1,080 |  |  | $ | 915 |  |  | $ | 960 |  |  | $ | 990 |  |  | $ | 5,270 |
Retiree medical (a) | $ | 95 |  |  | $ | 95 |  |  | $ | 90 |  |  | $ | 85 |  |  | $ | 80 |  |  | $ | 370 |
(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 2021 through 2025 and approximately $4 million in total for 2026 through 2030. These future benefit payments to beneficiaries include payments from both funded and unfunded plans.
Target Investment Allocation | For 2021 and 2020, our expected long-term rate of return on U.S. plan assets is 6.4% and 6.8%, respectively. Our target investment allocations for U.S. plan assets are as follows:
| 2021 |  | 2020
Fixed income | 51 | % |  | 50 | %
U.S. equity | 24 | % |  | 25 | %
International equity | 21 | % |  | 21 | %
Real estate | 4 | % |  | 4 | %
Effects Of 1-Percentage-Point Change In The Assumed Health Care Trend Rate | Retiree Medical Cost Trend Rates
| 2021 |  | 2020
Average increase assumed | 6 | % |  | 6 | %
Ultimate projected increase | 5 | % |  | 5 | %
Year of ultimate projected increase | 2040 |  | 2039
These assumed health care cost trend rates have an impact on the retiree medical plan expense and obligation, however the cap on our share of retiree medical costs limits the impact.
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:
| Pension |  | Retiree Medical
| U.S. |  | International |  |  |  |
| 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Selected information for plans with accumulated benefit obligation in excess of plan assets(a) |  |  |  |
Obligation for service to date | $ | (5,537) |  |  | $ | (9,194) |  |  | $ | (172) |  |  | $ | (192) |  |  |  |  |
Fair value of plan assets | $ | 4,156 |  |  | $ | 8,497 |  |  | $ | 123 |  |  | $ | 151 |  |  |  |  |
Selected information for plans with projected benefit obligation in excess of plan assets |  |  |  |  |  |
Benefit obligation | $ | (9,172) |  |  | $ | (10,169) |  |  | $ | (2,933) |  |  | $ | (632) |  |  | $ | (1,006) |  |  | $ | (988) |
Fair value of plan assets | $ | 7,088 |  |  | $ | 8,497 |  |  | $ | 2,696 |  |  | $ | 512 |  |  | $ | 315 |  |  | $ | 302 |
(a) The decrease in U.S. pension plans in 2020 primarily reflects the approved reorganization of the U.S. qualified defined benefit plans, resulting in the transfer of obligations and plan assets relating to certain participants from Plan A to Plan I and Plan H.
Employer Contributions | Contributions to our pension and retiree medical plans were as follows:
| Pension |  | Retiree Medical
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Discretionary (a) | $ | 339 |  |  | $ | 417 |  |  | $ | 1,417 |  |  | $ | — |  |  | $ | — |  |  | $ | 37 |
Non-discretionary | 168 |  |  | 255 |  |  | 198 |  |  | 55 |  |  | 44 |  |  | 56 |
Total | $ | 507 |  |  | $ | 672 |  |  | $ | 1,615 |  |  | $ | 55 |  |  | $ | 44 |  |  | $ | 93 |
(a)Includes $325 million contribution in 2020, $400 million contribution in 2019 and $1.4 billion contribution in 2018 to fund Plan A in the United States.

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