For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

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Name:	us-gaap_DueFromRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Related party transactions (Details) - USD ($) $ in Millions	Feb. 18, 2021	Nov. 15, 2019	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Convertible Debt
Related Party Transaction [Line Items]
Aggregate principal amount					$ 165.0
Convertible Notes \| Convertible Debt
Related Party Transaction [Line Items]
Aggregate principal amount					$ 165.0
Convertible Notes \| Convertible Debt \| Sonder Investors and Affiliates
Related Party Transaction [Line Items]
Aggregate principal amount			$ 43.3
Chief Executive Officer
Related Party Transaction [Line Items]
Number of shares granted and available for purchase (in shares)	3,061,794	5,613,290
Chief Executive Officer \| Promissory Note
Related Party Transaction [Line Items]
Amounts due from related party		$ 24.6
Interest on notes receivable from related party				$ 1.1
Related party notes receivable				$ 25.2