Retirement and Other Employee Benefits - Pension and Postretirement Health Care Benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Amortization of:
Settlement loss	$ 16	$ 0	$ 25	$ 0
Postretirement Health Care Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	1	1	2	2
Expected return on plan assets	(3)	(3)	(6)	(5)
Amortization of:
Unrecognized net loss	1	2	2	3
Unrecognized prior service benefit	(4)	(7)	(8)	(13)
Settlement loss	0	0	0	0
Net periodic pension cost (benefit)	(5)	(7)	(10)	(13)
U.S. | Pension Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	46	46	92	91
Expected return on plan assets	(57)	(55)	(115)	(110)
Amortization of:
Unrecognized net loss	11	9	22	19
Unrecognized prior service benefit	0	0	0	0
Settlement loss	0	0	0	0
Net periodic pension cost (benefit)	0	0	(1)	0
Non U.S. | Pension Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	2	2	4
Interest cost	10	14	20	28
Expected return on plan assets	(24)	(24)	(47)	(48)
Amortization of:
Unrecognized net loss	4	3	8	6
Unrecognized prior service benefit	0	0	0	0
Settlement loss	16	0	25	0
Net periodic pension cost (benefit)	$ 7	$ (5)	$ 8	$ (10)