Income Taxes - Unremitted Earnings of Foreign Subsidiaries (Details) $ in Millions	Sep. 30, 2021 USD ($)
Deferred Tax Liability Not Recognized, Undistributed Earnings of Foreign Subsidiaries [Abstract]
Unremitted earnings of foreign subsidiaries	$ 229

Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.

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Name:	us-gaap_UndistributedEarningsOfForeignSubsidiaries
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant