Employee Benefits (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2016 USD ($) plan	Jul. 04, 2015 USD ($)	Jul. 02, 2016 USD ($) plan	Jul. 04, 2015 USD ($)
Components of net periodic benefit cost:
Service cost	$ 2	$ 3	$ 4	$ 5
Interest cost	3	2	6	5
Expected return on plan assets	(2)	(2)	(4)	(4)
Amortization and other	1	1	2	2
Net periodic benefit cost	$ 4	$ 4	$ 8	$ 8
Defined benefit pension plan
Target allocation and pension plan asset allocation
Number of defined benefit plans | plan	2		2
Contributions expected to be made to defined benefit pension plans			$ 0