Basis of Preparation and Summary of Significant Accounting Policies-Transalation of Foreign Currencies - Additional Information (Detail) $ in Millions	12 Months Ended
Mar. 31, 2022 USD ($)
Foreign Currency Translation [Abstract]
Foreign currency transalation gain or loss, net	$ 3.0

Amount of foreign currency translation gain (loss) which increases (decreases) deferred policy acquisition costs.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 30
-Section 50
-Paragraph 2B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124505477&loc=SL117422543-158416

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 65
-Paragraph 2
-Subparagraph (g)(1)
-URI http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641

Name:	us-gaap_DeferredPolicyAcquisitionCostForeignCurrencyTranslationGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration