v3.25.4
Retirement Plans - Fair Value of Pension Plan Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 03, 2026
Dec. 28, 2024
Dec. 30, 2023
Change in fair value of plan assets      
Valuation of owned properties period 3 years    
Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets $ 9,559 $ 8,772 $ 8,413
Level 1 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 6,134 5,477  
Level 2 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 725 679  
Level 3 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 449 479  
Not Subject to Leveling | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 2,251 2,137  
Cash and equivalents | Level 1 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 254 159  
Cash and equivalents | Level 2 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 6 1  
Cash and equivalents | Level 3 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
Cash and equivalents | Not Subject to Leveling | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
Domestic equity securities | Level 1 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 2,969 3,151  
Domestic equity securities | Level 2 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
Domestic equity securities | Level 3 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
Domestic equity securities | Not Subject to Leveling | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 342 307  
International equity securities | Level 1 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 1,317 1,028  
International equity securities | Level 2 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
International equity securities | Level 3 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
International equity securities | Not Subject to Leveling | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 349 290  
Mutual funds | Level 1 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 184 194  
Mutual funds | Level 2 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
Mutual funds | Level 3 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
National, state and local governments | Level 1 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 1,327 899  
National, state and local governments | Level 2 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 112 60  
National, state and local governments | Level 3 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
National, state and local governments | Not Subject to Leveling | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 21 13  
Corporate debt | Level 1 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 83 46  
Corporate debt | Level 2 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 607 618  
Corporate debt | Level 3 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
Corporate debt | Not Subject to Leveling | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 154 148  
Private investment partnerships | Level 1 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
Private investment partnerships | Level 2 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
Private investment partnerships | Level 3 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
Private investment partnerships | Not Subject to Leveling | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 992 974  
Real estate | Level 1 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
Real estate | Level 2 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 0 0  
Real estate | Level 3      
Change in fair value of plan assets      
Fair value of total pension plan assets 449 479 $ 508
Real estate | Level 3 | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets 449 479  
Real estate | Not Subject to Leveling | Pension Benefits      
Change in fair value of plan assets      
Fair value of total pension plan assets $ 393 $ 405