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v3.19.1

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Summary of Annual Depreciation Rates (Detail) | 12 Months Ended
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Dec. 31, 2018
Bottom of range [member] | Network infrastructure [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Annual depreciation rates | 5.00%
Bottom of range [member] | Buildings and leasehold improvements [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Annual depreciation rates | 2.00%
Bottom of range [member] | Other assets [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Annual depreciation rates | 10.00%
Top of range [member] | Network infrastructure [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Annual depreciation rates | 33.00%
Top of range [member] | Buildings and leasehold improvements [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Annual depreciation rates | 33.00%
Top of range [member] | Other assets [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Annual depreciation rates | 50.00%

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- Definition Percentage of depreciation rate. + References No definition available. + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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