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Accounting Policies - Property, Plant and Equipment (Details) | 12 Months Ended
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Dec. 31, 2017
Buildings | Minimum |
Property, plant and equipment |
Estimated useful lives | 20 years
Buildings | Maximum |
Property, plant and equipment |
Estimated useful lives | 65 years
Building Improvements | Minimum |
Property, plant and equipment |
Estimated useful lives | 5 years
Building Improvements | Maximum |
Property, plant and equipment |
Estimated useful lives | 20 years
Technical Equipment | Minimum |
Property, plant and equipment |
Estimated useful lives | 3 years
Technical Equipment | Maximum |
Property, plant and equipment |
Estimated useful lives | 30 years
Satellite Transponders | Maximum |
Property, plant and equipment |
Estimated useful lives | 15 years
Furniture and Fixtures | Minimum |
Property, plant and equipment |
Estimated useful lives | 3 years
Furniture and Fixtures | Maximum |
Property, plant and equipment |
Estimated useful lives | 15 years
Transportation Equipment | Minimum |
Property, plant and equipment |
Estimated useful lives | 4 years
Transportation Equipment | Maximum |
Property, plant and equipment |
Estimated useful lives | 8 years
Computer Equipment | Minimum |
Property, plant and equipment |
Estimated useful lives | 3 years
Computer Equipment | Maximum |
Property, plant and equipment |
Estimated useful lives | 6 years
Leasehold Improvements | Minimum |
Property, plant and equipment |
Estimated useful lives | 5 years
Leasehold Improvements | Maximum |
Property, plant and equipment |
Estimated useful lives | 30 years

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