Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Cash and cash equivalents	$ 287		$ 188
Total cash, cash equivalents and restricted cash	1,168	$ 327
Trade accounts receivable, net
Accounts receivable	1,650		1,645
Less: allowance for doubtful accounts	(67)		(68)
Less: allowance for sales returns	0		(30)
Other sales reserves	(3)		0
Trade accounts receivable, net	1,580		1,548
Allowance for doubtful accounts
Beginning balance	68	73
Charges to expenses	4	3
Utilization of allowances	(5)	(1)
Ending balance	67	75
Inventories
Finished goods	717		685
Work-in-process	105		110
Raw materials	291		284
Inventories	1,113		1,078
Property, plant and equipment, net
Land	103		102
Buildings and improvements	1,132		1,120
Equipment, furniture and fixtures	3,246		3,183
Capital in progress	215		219
Property, plant and equipment	4,696		4,625
Less: accumulated depreciation	(2,996)		(2,928)
Property, plant and equipment, net	1,700		1,697
Accrued expenses
Legal reserves	1,255		1,176
Payroll and related liabilities	488		591
Business Combination, Contingent Consideration, Liability, Current	62		36
Other	643		653
Accrued expenses	2,447		2,456
Other long-term liabilities
Accrued income taxes	1,119		1,275
Legal reserves	256		436
Business Combination, Contingent Consideration, Liability, Noncurrent	92		133
Other Accrued Liabilities, Noncurrent	787		525
Other long-term liabilities	2,254		2,370
Supplemental Balance Sheet Information
Depreciation expense	68	$ 63
cash, cash equivalents, restricted cash and restricted cash equivalents, beginning of period			1,017	$ 487
Other Current Assets [Member]
Restricted cash included in Other long-term assets	850		803
Other Long Term Assets [Member]
Restricted cash included in Other long-term assets	$ 31		$ 26