Fair Value Measurements - Additional Information (Details) - 0.25% Senior Notes Due 2026 - USD ($) $ in Millions	Dec. 31, 2021	Sep. 30, 2021
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Aggregate principal amount of notes issued		$ 345.0
Debt instrument, interest rate		0.25%
Estimated fair value of notes issued	$ 312.2

Face (par) amount of debt instrument at time of issuance.

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Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant