Segment Information - Total Assets for Each Segment and Reconciling in Consolidated Financial Statements (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Jun. 30, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 7,079.6	$ 6,184.0
Softgel and Oral Technologies
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,453.7	1,586.5
Biologics
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,500.7	2,825.7
Oral and Specialty Drug Delivery
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,186.4	1,098.7
Clinical Supply Services
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	455.1	463.2
Corporate and Eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 483.7	$ 209.9