Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Line Items]
Cash and Cash Equivalents	$ 123	$ 208	$ 123	$ 208	$ 146
Restricted Cash and Cash Equivalents in Other current assets	2,657	756	2,657	756	655
Restricted Cash Equivalents in Other long-term assets	42	31	42	31	27
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	2,823	994	2,823	994	829	$ 1,017
Trade accounts receivable, net
Accounts receivable	1,785		1,785		1,676
Less: allowance for doubtful accounts	(73)		(73)		(68)
Trade accounts receivable, net	1,712		1,712		1,608
Allowance for doubtful accounts
Beginning balance	72	67	68	68
Charges to expenses	4	4	11	8
Utilization of allowances	(4)	(8)	(6)	(14)
Ending balance	73	63	73	63
Inventories
Inventory, Finished Goods, Net of Reserves	819		819		760
Inventory, Work in Process, Net of Reserves	113		113		100
Inventory, Raw Materials, Net of Reserves	367		367		306
Inventories	1,300		1,300		1,166
Property, plant and equipment, net
Land	97		97		97
Buildings and improvements	1,119		1,119		1,100
Equipment, furniture and fixtures	3,312		3,312		3,224
Capital in progress	332		332		319
Property, plant and equipment	4,861		4,861		4,740
Less: accumulated depreciation	3,040		3,040		2,958
Property, plant and equipment, net	1,820		1,820		1,782
Supplemental Balance Sheet Information
Depreciation expense	73	$ 70	142	$ 137
Accrued expenses
Legal reserves, current	470		470		712
Payroll and related liabilities	582		582		630
Accrued Rebates, Current	235		235		229
Business Combination, Contingent Consideration, Liability, Current	101		101		138
Other	543		543		538
Accrued expenses	1,932		1,932		2,246
Other long-term liabilities
Accrued income taxes	684		684		739
Legal reserves, noncurrent	134		134		217
Business Combination, Contingent Consideration, Liability, Noncurrent	293		293		209
Other Accrued Liabilities, Noncurrent	916		916		717
Other long-term liabilities	2,027		2,027		1,882
Acquisition Related [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Line Items]
Restricted Cash and Cash Equivalents in Other current assets	2,298		2,298		0
Non Acquisition Related [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Line Items]
Restricted Cash and Cash Equivalents in Other current assets	$ 360		$ 360		$ 655