Annual report pursuant to Section 13 and 15(d)

Derivative Instruments - Schedule of Notional Amounts of Outstanding Derivative Positions (Details)

v3.10.0.1
Derivative Instruments - Schedule of Notional Amounts of Outstanding Derivative Positions (Details) - CCH Interest Rate Derivatives [Member]
$ in Millions
12 Months Ended
Dec. 31, 2018
USD ($)
Derivative [Line Items]  
Initial Notional Amount $ 29
Effective Date May 20, 2015
Maturity Date May 31, 2022
Weighted Average Fixed Interest Rate Paid 2.30%
Variable Interest Rate Received One-month LIBOR
Maximum [Member]  
Derivative [Line Items]  
Initial Notional Amount $ 4,700