Organization and Business Operations - Additional Information (Details) - USD ($)		12 Months Ended
	Sep. 11, 2018	Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Amount placed in trust account		$ 400,000,000
Maximum maturity period		180 days
Regulatory withdrawal of interest from trust account, annual limit		$ 750,000
Regulatory withdrawal of interest from trust account, maximum period		24 months
Redemption percentage if business combination is not completed		100.00%
Number of days to seek shareholder approval for redemption of shares		2 days
Number of days to provide opportunity to shareholders to sell their shares		2 days
Dissolution expenses, maximum allowed		$ 100,000
Maximum
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Regulatory withdrawal of interest from trust account, maximum period		24 months
Number of months to complete business combination		24 months
Threshold net tangible assets		$ 5,000,001
Number of days to redeem the shares if Business combination is not completed		10 days
Minimum
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Percentage of fair market value		80.00%
Number of days to redeem the shares if Business combination is not completed		10 days
Private Placement
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Amount placed in trust account	$ 400,000,000