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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

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