Reinsurance - Additional Information (Details) $ in Millions	3 Months Ended
Mar. 31, 2021 USD ($)
Reinsurance Recoverable, Allowance for Credit Loss [Abstract]
Reinsurance, Loss on Uncollectible Accounts in Period, Amount	$ 0

Amount of the write-down or write-off of a receivable from a reinsurer.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447

Name:	us-gaap_ReinsuranceLossOnUncollectibleAccountsInPeriodAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration