Goodwill and Other Intangible Assets - Intangibles Assets (Details) - USD ($) $ in Millions	Apr. 03, 2020	Jan. 03, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 7,314	$ 7,461
Accumulated Amortization	1,015	875
Net Carrying Amount	6,299	6,586
Total intangibles assets, Gross Carrying Amount	9,186	9,333
Total intangibles assets	8,171	8,458
In process research and development
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangibles	69	69
L3 trade name
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangibles	1,803	1,803
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,454	6,518
Accumulated Amortization	769	653
Net Carrying Amount	5,685	5,865
Developed technologies
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	689	768
Accumulated Amortization	194	183
Net Carrying Amount	495	585
L3 trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	139	165
Accumulated Amortization	36	35
Net Carrying Amount	103	130
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	32	10
Accumulated Amortization	16	4
Net Carrying Amount	$ 16	$ 6