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v3.19.1

Significant accounting policies - Depreciation and Amortization (Details) | 12 Months Ended
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Dec. 31, 2018
Network infrastructure and equipment | Bottom of range |
Disclosure of detailed information about property, plant and equipment [line items] |
ESTIMATED USEFUL LIFE | 2 years
Network infrastructure and equipment | Top of range |
Disclosure of detailed information about property, plant and equipment [line items] |
ESTIMATED USEFUL LIFE | 40 years
Buildings | Bottom of range |
Disclosure of detailed information about property, plant and equipment [line items] |
ESTIMATED USEFUL LIFE | 5 years
Buildings | Top of range |
Disclosure of detailed information about property, plant and equipment [line items] |
ESTIMATED USEFUL LIFE | 50 years
Software | Bottom of range |
Disclosure of detailed information about intangible assets [line items] |
ESTIMATED USEFUL LIFE | 2 years
Software | Top of range |
Disclosure of detailed information about intangible assets [line items] |
ESTIMATED USEFUL LIFE | 12 years
Customer relationships | Bottom of range |
Disclosure of detailed information about intangible assets [line items] |
ESTIMATED USEFUL LIFE | 3 years
Customer relationships | Top of range |
Disclosure of detailed information about intangible assets [line items] |
ESTIMATED USEFUL LIFE | 26 years
Program and feature film rights | Top of range |
Disclosure of detailed information about intangible assets [line items] |
ESTIMATED USEFUL LIFE | 5 years

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