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Related Parties - Narrative (Details) - USD ($)					3 Months Ended		6 Months Ended
	Jun. 29, 2021	Jun. 25, 2021	Mar. 01, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Aug. 22, 2018
Related Party Transaction [Line Items]
Shares issued for conversion (in shares)				10,641,182
Shares repurchased (in shares)							7,901,657
Sapphire Holdings Sale of Stock
Related Party Transaction [Line Items]
Shares repurchased (in shares)	3,900,000		2,750,000
Sapphire Holding S.a. r.l. | Underwritten Secondary Offering
Related Party Transaction [Line Items]
Issuance of stock (in shares)		16,100,000
Margin Loan | Sapphire Holding S.a. r.l.
Related Party Transaction [Line Items]
Debt, face amount									$ 125,000,000.0
Affiliates
Related Party Transaction [Line Items]
Purchases from affiliates					$ 700,000	$ 1,400,000	$ 2,500,000	$ 1,600,000
WillScott Mobile Mini Holdings Corp and Subsidiaries | Sapphire Holding S.a. r.l.
Related Party Transaction [Line Items]
Percentage ownership					10.30%		10.30%

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