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Summary of significant accounting policies - Revenue Recognition (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Revenue recognition |  |
Accrued sales allowances | $ 69.4 | $ 44.8
Percentage of Medicare Part D insurance coverage gap mandate to be funded by manufacturers | 50.00% |
ICLUSIG |  |
Revenue recognition |  |
Amortization period | 12 years 6 months |

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- Definition Represents the percentage of Medicare Part D insurance coverage gap mandate to be funded by manufacturers for prescription drugs sold to eligible patients. + References No definition available. + Details
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- Definition Amount of accumulated credit loss for right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130533-203044 + Details
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- Definition Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Details
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