Other Long Term Liabilities - Summary of Other Long Term Liabilities (Detail) $ in Millions	Jun. 30, 2019 USD ($)
Other Liabilities Disclosure [Abstract]
Pension obligation	$ 6.8
Other	1.0
Total other long-term liabilities	$ 7.8

Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as noncurrent. Excludes other postretirement benefit plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant