Investments Held in Trust Account - Additional Information (Details) - USD ($)			11 Months Ended	12 Months Ended
Aug. 09, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2018
Assets Held in Trust Account [Line Items]
Gross proceeds from public offering		$ 450,000,000	$ 450,000,000	$ 0
Gross proceeds from private placement warrants		11,000,000	11,000,000	0
Payments of underwriting discounts			9,000,000	0
Cash			372,073	512,827
Repay notes payable		300,000	300,000	0
Interest on investments held in Trust Account			0	7,669,551
Withdrawal of interest from Trust Account to pay operating expenses	$ 750,000		0	750,000
Investments held in Trust Account			$ 450,000,000	456,919,551
Public Offering
Assets Held in Trust Account [Line Items]
Payments of underwriting discounts		9,000,000		$ 9,000,000
Private Placement
Assets Held in Trust Account [Line Items]
Cash		$ 2,000,000

Assets held in trust.

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- Definition

Trust account interest withdrawal to pay operating expenses.

+ References

No definition available.

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- Definition

The amount of cash, securities, or other assets held by a third-party trustee pursuant to the terms of an agreement which assets are available to be used by beneficiaries to that agreement only within the specific terms thereof and which agreement is expected to terminate more than one year from the balance sheet date (or operating cycle, if longer) at which time the assets held-in-trust will be released or forfeited.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(b))
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- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
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- Definition

Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7(b))
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (c)
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- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
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- Definition

The cash inflow associated with the amount received from entity's first offering of stock to the public.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

+ References

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- Definition

The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates.

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