Segment and Geographic Data - Selected financial information by geographic area (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jan. 04, 2020	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Jan. 04, 2020	Dec. 29, 2018	Dec. 30, 2017
Revenues from External Customers and Long-Lived Assets
Revenues	$ 4,035	$ 3,259	$ 3,227	$ 3,109	$ 3,750	$ 3,200	$ 3,726	$ 3,296	$ 13,630	$ 13,972	$ 14,198
Property, plant and equipment, net	2,527				2,615				2,527	2,615
United States
Revenues from External Customers and Long-Lived Assets
Revenues									8,963	8,667	8,786
Property, plant and equipment, net	2,054				2,115				2,054	2,115
Europe
Revenues from External Customers and Long-Lived Assets
Revenues									1,986	2,187	1,962
Property, plant and equipment, net	244				267				244	267
Asia and Australia
Revenues from External Customers and Long-Lived Assets
Revenues									1,070	1,253	1,206
Property, plant and equipment, net	97				88				97	88
Other international
Revenues from External Customers and Long-Lived Assets
Revenues									1,611	1,865	$ 2,244
Property, plant and equipment, net	$ 132				$ 145				$ 132	$ 145