Retirement and Other Employee Benefits - Pension and Postretirement Health Care Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 04, 2026	Mar. 29, 2025
Postretirement Health Care Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 1	$ 1
Expected return on plan assets	(3)	(3)
Amortization of:
Unrecognized net loss	1	1
Unrecognized prior service cost (benefit)	1	1
Net periodic pension benefits	0	0
U.S. | Pension Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost	47	50
Expected return on plan assets	(74)	(76)
Amortization of:
Unrecognized net loss	10	6
Unrecognized prior service cost (benefit)	0	0
Net periodic pension benefits	(17)	(20)
Foreign Plan | Pension Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost	14	14
Expected return on plan assets	(26)	(26)
Amortization of:
Unrecognized net loss	4	2
Unrecognized prior service cost (benefit)	(1)	(1)
Net periodic pension benefits	$ (9)	$ (11)