Derivative Instruments (Basis Swaps, Interest Rate Caps and Collars) (Details) $ in Millions |
9 Months Ended |
|---|---|
|
Sep. 30, 2018
USD ($)
| |
| Interest Rate Caps | |
| Derivative [Line Items] | |
| Notional amount of derivative | $ 260.8 |
| Interest Rate Collars | |
| Derivative [Line Items] | |
| Notional amount of derivative | $ 659.1 |
| Virgin Media | Basis Swaps | |
| Derivative [Line Items] | |
| Weighted average remaining life | 18 days |
| UPC Holding | Basis Swaps | |
| Derivative [Line Items] | |
| Weighted average remaining life | 18 days |
| Telenet | Basis Swaps | |
| Derivative [Line Items] | |
| Weighted average remaining life | 18 days |
| Notional amount due from counterparty | Virgin Media | Basis Swaps | |
| Derivative [Line Items] | |
| Notional amount of derivative | $ 8,495.5 |
| Notional amount due from counterparty | UPC Holding | Basis Swaps | |
| Derivative [Line Items] | |
| Notional amount of derivative | 3,620.0 |
| Notional amount due from counterparty | Telenet | Basis Swaps | |
| Derivative [Line Items] | |
| Notional amount of derivative | $ 3,675.0 |