Special Charges - 2020 Covid 19 Restructuring Plan (Details) $ in Millions	3 Months Ended			9 Months Ended
	Oct. 03, 2020 USD ($) borrowingGroup	Jul. 04, 2020 USD ($)	Sep. 28, 2019 USD ($)	Oct. 03, 2020 USD ($)	Sep. 28, 2019 USD ($)
2020 Restructuring Plan
Special charges	$ 7		$ 0	$ 124	$ 0
Reconciling Items
2020 Restructuring Plan
Special charges	7		0	124	0
TRU inventory valuation charge	0	$ 55	$ 0		$ 0
2020 COVID-19 Restructuring Plan
2020 Restructuring Plan
Additional expected restructuring costs	15			15
Special charges	$ 7			85
Number of positions eliminated | borrowingGroup	2,800
Percentage of workforce reduction	8.00%
Minimum | 2020 COVID-19 Restructuring Plan
2020 Restructuring Plan
Total expected restructuring plan cost	$ 125			125
Expected asset impairment charges	25
Minimum | 2020 COVID-19 Restructuring Plan | Severance Costs
2020 Restructuring Plan
Expected restructuring plan cost	70			70
Minimum | 2020 COVID-19 Restructuring Plan | Contract Terminations and Others
2020 Restructuring Plan
Expected restructuring plan cost	30			30
Maximum | 2020 COVID-19 Restructuring Plan
2020 Restructuring Plan
Total expected restructuring plan cost	145			145
Expected asset impairment charges	30
Maximum | 2020 COVID-19 Restructuring Plan | Severance Costs
2020 Restructuring Plan
Expected restructuring plan cost	80			80
Maximum | 2020 COVID-19 Restructuring Plan | Contract Terminations and Others
2020 Restructuring Plan
Expected restructuring plan cost	$ 35			$ 35