Pensions - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Jan. 02, 2022
Defined Benefit Plan Disclosure [Line Items]
Settlement loss	$ (14)
Curtailment gain	4
Projected benefit plan contributions	17
Total benefit plan expense allocated	17	$ 54	$ 93
Defined contribution plan, cost	46	14	14
Cost of benefit	18	$ 46	$ 49
Related Party
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 94
Johnson & Johnson
Defined Benefit Plan Disclosure [Line Items]
Participation right after separation, term	15 years
Defined benefit plan, plan assets, amortization period	15 years