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Litigation and contingencies - Additional Information (Detail) € in Millions, $ in Millions		1 Months Ended
	Jun. 26, 2014 USD ($)	Apr. 30, 2007 EUR (€)	Dec. 31, 2019 USD ($)	Apr. 30, 2008 EUR (€)
Loss Contingencies [Line Items]
Amount related to unreserved tax-related matters, inclusive of interest (up to) | $			$ 103
Ministry of Justice of Belgium
Loss Contingencies [Line Items]
Loss contingency, damages sought value | €		€ 28.0
Counterclaim against termination of contract | €				€ 18.5
Pharmaceutical Claims
Loss Contingencies [Line Items]
Loss contingency, damages sought value | $	$ 100

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Contract Termination Counterclaims Governments Other Than US Federal Government

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Unreserved Tax Related Matters Inclusive of Interest

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- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
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