v3.25.2
Pension, Retiree Medical and Savings Plans (Categorized Plan Assets Measured at Fair Value) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 28, 2024
Dec. 30, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]      
Maximum Real estate notice period 90 days    
Minimum Real estate notice period 30 days    
Cash Collateral for Borrowed Securities $ 447    
US Plan Assets [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 10,772 $ 11,724  
Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 3,397 3,528 $ 3,195
Domestic Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 10,609 11,541 11,148
Securities Loaned 630    
Postretirement Health Coverage [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 163 $ 183 $ 196
Defined Benefit Plan, Equity Securities, Large Cap [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Representation of one fund in total U.S. plan assets 12.00% 13.00%  
Fixed Income Commingled funds [Member] | Level 1 | Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 557 $ 526  
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Level 2 | Domestic Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 125 133  
US Government Agencies Debt Securities [Member] | Level 2 | Domestic Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 1,538 1,812  
Corporate Bonds [Member] | Level 2 | Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 469 267  
Corporate Bonds [Member] | Level 2 | Domestic Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 3,903 4,233  
Government Securities | Level 2 | Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 932 $ 1,207  
Corporate Bonds      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Percentage 31.00% 31.00%  
Contracts With Insurance Companies | Level 3 | Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 29 $ 30  
Contracts With Insurance Companies | Level 3 | Domestic Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 1 1  
Cash And Cash Equivalents | Level 1 | Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 128 143  
Cash And Cash Equivalents | Level 1 | Domestic Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 456 3  
Cash And Cash Equivalents | Level 2 | Domestic Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 276 346  
Cash And Cash Equivalents | Fair Value, Inputs, Level 1, 2 and 3 | Domestic Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 732 349  
Real Estate Funds [Member] | Fair Value Measured at Net Asset Value Per Share | Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 79 162  
Real Estate Funds [Member] | Fair Value Measured at Net Asset Value Per Share | Domestic Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 561 411  
Dividends And Interest Receivable | Fair Value Measured at Net Asset Value Per Share | Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 31 18  
Dividends And Interest Receivable | Fair Value Measured at Net Asset Value Per Share | Domestic Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount (358) 87  
Equity Securities [Member] | Level 1 | Domestic Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 4,270 4,698  
Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 | Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 1,172 1,175  
Sub-Total U.S. Plan Assets | Fair Value, Inputs, Level 1, 2 and 3 | Domestic Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 10,569 11,226  
Sub-Total International Plan Assets | Fair Value, Inputs, Level 1, 2 and 3 | Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 3,287 $ 3,348