Summary of Significant Accounting Policies - Schedule of Impact of Adoption (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales to customers	$ 20,747	$ 20,729	$ 20,562	$ 20,021	$ 20,394	$ 20,348	$ 20,830	$ 20,009	$ 82,059	$ 81,581	$ 76,450
Net earnings	4,010	$ 1,753	$ 5,607	$ 3,749	3,042	$ 3,934	$ 3,954	$ 4,367	15,119	15,297	1,300
Assets	157,728				152,954				157,728	152,954
Liabilities	98,257				93,202				98,257	93,202
Equity	$ 59,471				$ 59,752				$ 59,471	$ 59,752	$ 60,160	$ 70,418