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Retirement Plans
 3 Months Ended
Mar. 30, 2024
Retirement Benefits [Abstract]  
Retirement Plans Retirement Plans
We provide defined benefit pension plans and other postretirement benefits to eligible employees.  The components of net periodic benefit income for these plans are as follows:
Three Months Ended
(In millions)March 30,
2024		April 1,
2023
Pension Benefits
Service cost$17 $17 
Interest cost90 91 
Expected return on plan assets(159)(152)
Amortization of net actuarial loss1 — 
Amortization of prior service cost2 3 
Net periodic benefit income*$(49)$(41)
Postretirement Benefits Other Than Pensions
Interest cost$2 $2 
Amortization of net actuarial gain(2)(2)
Amortization of prior service credit— (1)
Net periodic benefit income$— $(1)
* Excludes the cost associated with the defined contribution component, included in certain of our U.S.-based defined benefit pension plans, that totaled $4 million for both the first quarter of 2024 and 2023.