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Retirement Benefits (Tables)
6 Months Ended
Jul. 04, 2025
Retirement Benefits [Abstract]  
Schedule of Net Periodic Pension Benefit The components of net periodic pension benefit related to the frozen U.K. pension for the three and six months ended July 4, 2025 and June 28, 2024, respectively, were as follows:
 Three Months EndedSix Months Ended
July 4,June 28,July 4,June 28,
Dollars in millions2025202420252024
Components of net periodic pension benefit
Interest cost$15 $15 $30 $30 
Expected return on plan assets(28)(28)(54)(56)
Amortization of prior service cost— — 
Recognized actuarial loss
Net periodic pension benefit$(11)$(12)$(21)$(24)