Summary of Significant Accounting Policies - Schedule of Impact of Adoption (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales to customers	$ 20,394	$ 20,348	$ 20,830	$ 20,009	$ 20,195	$ 19,650	$ 18,839	$ 17,766	$ 81,581	$ 76,450	$ 71,890
Net earnings	3,042	$ 3,934	$ 3,954	$ 4,367	(10,713)	$ 3,764	$ 3,827	$ 4,422	15,297	1,300	16,540
Assets	152,954				157,303				152,954	157,303
Liabilities	93,202				97,143				93,202	97,143
Equity	59,752				$ 60,160				59,752	$ 60,160	$ 70,418	$ 71,150
Balance without adoption of ASC 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales to customers									81,546
Net earnings									15,269
Assets	152,977								152,977
Liabilities	93,206								93,206
Equity	59,771								59,771
ASU 2014-09 - Revenue from Contracts with Customers | Effect of change
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales to customers									(35)
Net earnings									(28)
Assets	23								23
Liabilities	4								4
Equity	$ 19								$ 19