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Revenue - Assets Recognized for Costs to Obtain a Contract with a Customer (Details)
Dec. 31, 2021
Capitalized commission fees | Minimum  
Assets Recognized for Costs to Obtain a Contract with a Customer  
Amortization period 2 years
Capitalized commission fees | Maximum  
Assets Recognized for Costs to Obtain a Contract with a Customer  
Amortization period 10 years
Capitalized transmitter costs | Minimum  
Assets Recognized for Costs to Obtain a Contract with a Customer  
Amortization period 8 years
Capitalized transmitter costs | Maximum  
Assets Recognized for Costs to Obtain a Contract with a Customer  
Amortization period 10 years