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Revenue (Detail) | 9 Months Ended
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Sep. 30, 2020
Revenue, Performance Obligation [Abstract] |
Number of Types of Performance Obligations | 2
Stand Ready Performance Obligations [Member] |
Revenue, Performance Obligation [Abstract] |
Revenue, Performance Obligation, Description of Good or Service | those that require us to stand ready to provide goods and services to a customer to use as and when requested (“Stand Ready Performance Obligations”)
Other Performance Obligations [Member] |
Revenue, Performance Obligation [Abstract] |
Revenue, Performance Obligation, Description of Good or Service | those that do not require us to stand ready (“Other Performance Obligations”)

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- Definition Number of Types of Performance Obligations + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Description of good or service to be transferred in contract with customer. Includes, but is not limited to, arrangement for another party to transfer good or service to customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130554-203045 + Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=ck0001552033_OtherPerformanceObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |