Goodwill and Other Intangible Assets - Summary Of Weighted Average Remaining Useful Lives Per Intangible Asset Category (Detail)  | 
12 Months Ended | 
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Dec. 31, 2021  | |
| Customer Relationships [Member] | |
| Finite-Lived Intangible Assets [Line Items] | |
| Weighted average remaining useful lives per intangible asset category | 5 years 9 months 18 days | 
| Technology [Member] | |
| Finite-Lived Intangible Assets [Line Items] | |
| Weighted average remaining useful lives per intangible asset category | 3 years 1 month 6 days | 
| Carrier contracts [Member] | |
| Finite-Lived Intangible Assets [Line Items] | |
| Weighted average remaining useful lives per intangible asset category | 4 years | 
| Trademarks [Member] | |
| Finite-Lived Intangible Assets [Line Items] | |
| Weighted average remaining useful lives per intangible asset category | 5 years 1 month 6 days | 
| Internally developed computer software [Member] | |
| Finite-Lived Intangible Assets [Line Items] | |
| Weighted average remaining useful lives per intangible asset category | 4 years | 
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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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