Summary of Significant Accounting Policies - Narrative (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) Employee Segment	Jan. 01, 2017 USD ($)	Jan. 03, 2016 USD ($)	Apr. 01, 2018 USD ($)
Concentration of Credit Risk [Line Items]
Number of employees | Employee		134,000
Number of business segments | Segment		3
Excess tax benefits			$ 353
Deferred taxes on income	$ 7,105	$ 7,105	6,148
Other assets	4,971	4,971	4,435
Retained earnings	101,793	$ 101,793	$ 110,551
Minimum reverse repurchase agreement collateral (as a percent)		102.00%
Sales return reserve (as a percent)			1.00%
Shipping and handling costs		$ 1,042	$ 974	$ 996
Shipping and handling costs as a percent of sales		0.50%
Advertising expense		$ 2,500	$ 2,400	$ 2,500
Provisional toll tax charge	10,100
Deferred tax liability foreign taxes	4,457	4,457
Deferred tax asset offset	$ 1,100	$ 1,100
Minimum | Software Development [Member]
Concentration of Credit Risk [Line Items]
Estimated useful lives of the assets		3 years
Maximum | Software Development [Member]
Concentration of Credit Risk [Line Items]
Estimated useful lives of the assets		8 years
Research and Development Expense [Member]
Concentration of Credit Risk [Line Items]
Concentration risk (as a percent)		5.00%
Scenario, Forecast [Member] | Accounting Standards Update 2016-16 [Member]
Concentration of Credit Risk [Line Items]
Deferred taxes on income					$ 2,000
Other assets					(700)
Retained earnings					$ 1,300