Derivative Instruments (Basis Swaps, Interest Rate Caps and Collars) (Details) $ in Millions |
6 Months Ended |
|---|---|
|
Jun. 30, 2018
USD ($)
| |
| Interest Rate Caps | |
| Derivative [Line Items] | |
| Notional amount of derivative | $ 164.9 |
| Interest Rate Collars | |
| Derivative [Line Items] | |
| Notional amount of derivative | $ 662.7 |
| Virgin Media | Basis Swaps | |
| Derivative [Line Items] | |
| Weighted average remaining life | 15 days |
| UPC Holding | Basis Swaps | |
| Derivative [Line Items] | |
| Weighted average remaining life | 15 days |
| Telenet | Basis Swaps | |
| Derivative [Line Items] | |
| Weighted average remaining life | 15 days |
| Notional amount due from counterparty | Virgin Media | Basis Swaps | |
| Derivative [Line Items] | |
| Notional amount of derivative | $ 4,587.5 |
| Notional amount due from counterparty | UPC Holding | Basis Swaps | |
| Derivative [Line Items] | |
| Notional amount of derivative | 1,975.0 |
| Notional amount due from counterparty | Telenet | Basis Swaps | |
| Derivative [Line Items] | |
| Notional amount of derivative | $ 1,600.0 |