Revenues (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Prior period sales due to change in estimates as a percentage of aggregate sales deductions (less than)	1.00%
Sales return provisions as a percentage of gross product sales (less than)	1.00%
New Accounting Pronouncement, Early Adoption [Line Items]
Retained earnings	$ (14,387)	$ (5,072)
Minimum [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Revenue payment term	30 days
Maximum [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Revenue payment term	120 days
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Retained earnings		$ 25