Litigation - Additional Information (Detail) - Actavis - Patent		1 Months Ended
	Oct. 13, 2017	Jun. 30, 2015
Litigation [Line Items]
Number of patents claimed to be infringed		7
Subsequent Event
Litigation [Line Items]
Number of patents claims valid and infringed	3
Subsequent Event | U.S. Patent No. 7,462,626
Litigation [Line Items]
Patent expiry year	2024
Subsequent Event | U.S. Patent No. 7,375,111
Litigation [Line Items]
Patent expiry year	2025
Subsequent Event | U.S. Patent No. 8,916,195
Litigation [Line Items]
Patent expiry year	2030