Subsequent Event - Additional Information (Detail) - AbbVie - Subsequent Event $ in Millions	1 Months Ended
Oct. 31, 2017 USD ($)
Subsequent Event [Line Items]
Collaborative arrangement even-based payment amount	$ 30
Collaborative arrangement even-based payment period	30 days

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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