Noncontrolling Interest - Additional Information (Details) - Faxian	Apr. 30, 2019
Variable Interest Entity, Primary Beneficiary
Minority Interest [Line Items]
Equity interest percentage	50.00%
WuXi AppTech
Minority Interest [Line Items]
Equity interest percentage	50.00%

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

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration