Retirement and Other Employee Benefits - Pension and Postretirement Health Care Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Postretirement Health Care Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	0	0	1	1
Expected return on plan assets	(3)	(3)	(8)	(8)
Amortization of:
Unrecognized net loss	1	1	2	3
Unrecognized prior service benefit	(1)	(3)	(4)	(11)
Net periodic pension benefits	(3)	(5)	(9)	(15)
U.S. | Pension Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	29	36	87	108
Expected return on plan assets	(59)	(57)	(177)	(169)
Amortization of:
Unrecognized net loss	17	15	51	44
Unrecognized prior service benefit	0	0	0	0
Net periodic pension benefits	(13)	(6)	(39)	(17)
Non-U.S. | Pension Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	1	1
Interest cost	5	7	16	21
Expected return on plan assets	(25)	(21)	(75)	(63)
Amortization of:
Unrecognized net loss	4	4	12	11
Unrecognized prior service benefit	(1)	(1)	(2)	(1)
Net periodic pension benefits	$ (17)	$ (11)	$ (48)	$ (31)