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Description of the business and summary of significant accounting policies: - Property and equipment (Details) | Dec. 31, 2024
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IRU Finance Lease Agreement |
Property and equipment |
Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration] | us-gaap:UsefulLifeShorterOfTermOfLeaseOrAssetUtilityMember
IRU Finance Lease Agreement | Minimum |
Property and equipment |
Depreciation or amortization period (in years) | 15 years
IRU Finance Lease Agreement | Maximum |
Property and equipment |
Depreciation or amortization period (in years) | 20 years
Network equipment | Minimum |
Property and equipment |
Depreciation or amortization period (in years) | 2 years
Network equipment | Maximum |
Property and equipment |
Depreciation or amortization period (in years) | 8 years
Owned buildings and leasehold improvements |
Property and equipment |
Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration] | us-gaap:UsefulLifeShorterOfTermOfLeaseOrAssetUtilityMember
Software |
Property and equipment |
Depreciation or amortization period (in years) | 5 years
Owned buildings | Minimum |
Property and equipment |
Depreciation or amortization period (in years) | 16 years
Owned buildings | Maximum |
Property and equipment |
Depreciation or amortization period (in years) | 40 years
Office and other equipment | Minimum |
Property and equipment |
Depreciation or amortization period (in years) | 2 years
Office and other equipment | Maximum |
Property and equipment |
Depreciation or amortization period (in years) | 7 years
Asset retirement obligations |
Property and equipment |
Depreciation or amortization period (in years) | 4 years
System infrastructure (including owned fiber) | Minimum |
Property and equipment |
Depreciation or amortization period (in years) | 5 years
System infrastructure (including owned fiber) | Maximum |
Property and equipment |
Depreciation or amortization period (in years) | 40 years

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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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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- Definition Indicates description of term of useful life for property, plant, and equipment when not stated as numeric value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 35 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482190/360-10-35-3 + Details
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- Details
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- Details
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