Derivative Instruments - Schedule of Notional Amounts of Outstanding Derivative Positions (Details) - CCH Interest Rate Derivatives [Member] $ in Millions	3 Months Ended
	Mar. 31, 2019 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