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Related parties transactions - Additional information (Details) - USD ($)	3 Months Ended	12 Months Ended
	Apr. 08, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of transactions between related parties [line items]
Contract manufacturing revenues from former parent	$ 47,000,000	$ 47,000,000	$ 0	$ 0
Purchases from former parent	19,000,000	19,000,000	4,000,000	3,000,000
Services received, related party transactions	$ 40,000,000		553,000,000	535,000,000
Personnel compensation		24,100,000	$ 22,400,000	$ 16,900,000
Key management personnel of entity or parent [member]
Disclosure of transactions between related parties [line items]
Personnel compensation		$ 84,844

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- Definition

Revenue From Contract Manufacturing, Related Party Transactions

+ References

No definition available.

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]]

+ References

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- Definition

The amount of goods purchased by the entity in related party transactions. [Refer: Related parties [member]]

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- Definition

The amount of services received in related party transactions. [Refer: Related parties [member]]

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