Proceeds from Issuance of Common Stock, Net of Underwriter Discount and Offering Expenses

No definition available.

Name:	bgne_ProceedsFromIssuanceOfCommonStockNetOfUnderwriterDiscountAndOfferingExpenses
Namespace Prefix:	bgne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Subsequent Event (Details) - Follow-on public offering - USD ($) $ in Thousands	Aug. 08, 2018	Jan. 22, 2018
Shareholders' equity
Net proceeds		$ 757,587
Subsequent Event
Shareholders' equity
Net proceeds	$ 870,107