Supplemental Financial Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest Expense, Net
Interest expense	$ 1,784	$ 1,348	$ 1,150
Interest income	(275)	(204)	(146)
Interest expense, net	1,509	1,144	$ 1,004
Accounts Payable and Accrued Liabilities
Sales rebates	4,484	3,939
Dividends payable	1,771	1,607
Accounts payable	1,452	1,546
Salaries, wages and commissions	830	787
Royalty and license arrangements	324	304
Other	2,971	3,748
Accounts payable and accrued liabilities	11,832	11,931
Other Long-Term Liabilities
Contingent consideration liabilities	7,201	4,306
Income taxes payable	3,453	4,311
Pension and other post-employment benefits	2,949	1,840
Liabilities for unrecognized tax benefits	2,772	2,726
Other	1,222	1,307
Other long-term liabilities	$ 17,597	$ 14,490