Investments In And Advances To Affiliates (Combined Balance Sheets And Statements Of Earnings Of The Company's Unconsolidated Affiliates) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Combined balance sheets and statements of earnings of the Company's unconsolidated affiliates:
Current assets	$ 30,732	$ 28,200
Non-current assets	21,841	21,411
Current liabilities	(26,592)	(24,209)
Non-current liabilities	(6,205)	(4,250)
Noncontrolling interests	(677)	(981)
Net assets	19,099	20,171
Net sales	53,143	55,908	$ 45,296
Gross profit	5,118	4,687	4,375
Net income	$ 1,881	$ 1,800	$ 1,119