Commitments and Contingencies (Details) $ in Millions	Dec. 31, 2019 USD ($)
Connectivity Agreement
Unrecorded Unconditional Purchase Obligation [Line Items]
Amount obligated to pay	$ 0.7
Credit Voucher agreement
Unrecorded Unconditional Purchase Obligation [Line Items]
Amount obligated to pay	33.0
Unconditional purchase obligation incurred	0.7
Scenario One, Make-up Payment Requirement, Year One [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Make-up payment obligation	8.6
Aggregate monthly charge offset	8.6
Scenario Two, Make-up Payment Requirement , Year Two [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Make-up payment obligation	15.2
Aggregate monthly charge offset	15.2
Scenario Three, Make-up Payment Requirement , Year Three [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Make-up payment obligation	23.1
Aggregate monthly charge offset	23.1
Accrued Expenses And Other Payables [Member] | Connectivity Agreement
Unrecorded Unconditional Purchase Obligation [Line Items]
Unconditional purchase obligation incurred	$ 0.1