Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Line Items]
Cash and Cash Equivalents	$ 277	$ 168	$ 277	$ 168	$ 146
Restricted Cash and Cash Equivalents in Other current assets	357	781	357	781	655
Restricted Cash Equivalents in Other long-term assets	43	31	43	31	27
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	676	980	676	980	829	$ 1,017
Trade accounts receivable, net
Accounts receivable	1,871		1,871		1,676
Less: allowance for doubtful accounts	(75)		(75)		(68)
Trade accounts receivable, net	1,796		1,796		1,608
Allowance for doubtful accounts
Beginning balance	73	63	68	68
Charges to expenses	8	6	19	15
Utilization of allowances	(5)	(4)	(11)	(17)
Ending balance	75	66	75	66
Inventories
Inventory, Finished Goods, Net of Reserves	940		940		760
Inventory, Work in Process, Net of Reserves	206		206		100
Inventory, Raw Materials, Net of Reserves	420		420		306
Inventories	1,566		1,566		1,166
Property, plant and equipment, net
Land	112		112		97
Buildings and improvements	1,160		1,160		1,100
Equipment, furniture and fixtures	3,368		3,368		3,224
Capital in progress	357		357		319
Property, plant and equipment	4,996		4,996		4,740
Less: accumulated depreciation	3,055		3,055		2,958
Property, plant and equipment, net	1,942		1,942		1,782
Supplemental Balance Sheet Information
Depreciation expense	79	$ 74	220	$ 212
Accrued expenses
Legal reserves, current	328		328		712
Payroll and related liabilities	693		693		630
Accrued Rebates, Current	280		280		229
Business Combination, Contingent Consideration, Liability, Current	112		112		138
Other	518		518		538
Accrued expenses	1,932		1,932		2,246
Other long-term liabilities
Accrued income taxes	671		671		739
Legal reserves, noncurrent	240		240		217
Business Combination, Contingent Consideration, Liability, Noncurrent	268		268		209
Other Accrued Liabilities, Noncurrent	1,227		1,227		717
Other long-term liabilities	2,406		2,406		$ 1,882
Non Acquisition Related [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Line Items]
Restricted Cash and Cash Equivalents in Other current assets	$ 357		$ 357