Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Current Assets [Abstract]
Restricted cash and restricted cash equivalents included in Other current assets	$ 208	$ 346	$ 655
Derivative Asset, Current	133	105
Licensing arrangements	148	186
Other Assets, Miscellaneous, Current	263	243
Other Assets, Current	751	880
Trade accounts receivable, net
Trade accounts receivable	1,637	1,902
Allowance for credit losses	(105)	(74)
Trade accounts receivable, net	1,531	1,828
Allowance for doubtful accounts
Accounts Receivable, Allowance for Credit Loss (beginning balance)	74	68	68
Cumulative effect adjustment for adoption of ASC 2016-13	10
Net (credits) charges to expenses	49	23	19
Utilization of allowances	(27)	(17)	(19)
Accounts Receivable, Allowance for Credit Loss (ending balance)	105	74	68
Inventory, Net [Abstract]
Inventory, Finished Goods, Net of Reserves	893	971
Inventory, Work in Process, Net of Reserves	109	192
Inventory, Raw Materials, Net of Reserves	349	416
Inventories	1,351	1,579
Property, plant and equipment, net
Land	104	117
Buildings and improvements	1,292	1,198
Equipment, furniture and fixtures	3,465	3,411
Capital in progress	446	442
Property, plant and equipment	5,308	5,169
Less: accumulated depreciation	3,224	3,089
Property, plant and equipment, net	$ 2,084	$ 2,079	1,782
Supplemental Balance Sheet Information (Textuals)
Percent of finished goods at consignment	33.00%	32.00%
Depreciation	$ 333	$ 311	296
Other Assets, Noncurrent [Abstract]
Restricted Cash Equivalents included in Other long-term assets	52	43	27
Operating Lease, Right-of-Use Asset	458	336	$ 0
Derivative Asset	109	216
Investments	918	458
Licensing arrangements, asset	218	332
Other, Other Long-term Assets	166	144
Other long-term assets (total)	1,921	1,529
Accrued expenses
Legal reserves	505	470
Payroll and related liabilities	681	708
Accrued Rebates, Current	331	298
Contingent consideration	26	56
Other	656	576
Accrued liabilities, current	2,197	2,109
Other Liabilities, Current [Abstract]
Deferred Revenue, Current	138	144
Accrued Royalties, Current	153	197
Taxes Payable, Current	158	265
Disposal Group, Including Discontinued Operation, Liabilities, Current	200	0
Other Sundry Liabilities, Current	307	195
Other current liabilities	958	800
Other long-term liabilities
Other long-term liabilities	2,309	2,635
Other Noncurrent Liabilities [Member]
Other long-term liabilities
Accrued Income Taxes, Noncurrent	547	667
Estimated Litigation Liability, Noncurrent	64	227
Business Combination, Contingent Consideration, Liability, Noncurrent	171	299
Licensing arrangements, liability	253	374
Operating Lease, Liability, Noncurrent	401	276
Deferred Revenue	257	257
Other Accrued Liabilities, Noncurrent	615	535
Operating Lease, Liability, Noncurrent	401	276
Accrued Income Taxes, Noncurrent	547	667
Estimated Litigation Liability, Noncurrent	64	227
Business Combination, Contingent Consideration, Liability, Noncurrent	171	299
Licensing arrangements, liability	253	374
Deferred Revenue	257	257
Other Accrued Liabilities, Noncurrent	$ 615	$ 535