Annual report pursuant to Section 13 and 15(d)

Debt - CCH Working Capital Facility (Details)

v3.10.0.1
Debt - CCH Working Capital Facility (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Jun. 30, 2018
Jun. 01, 2018
CCH Working Capital Facility [Member]      
Line of Credit Facility [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity $ 1,200,000,000.0    
Debt Instrument, Description of Variable Rate Basis LIBOR or base rate    
Maturity date Jun. 29, 2023    
CCH Working Capital Facility [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 1.25%    
CCH Working Capital Facility [Member] | Minimum [Member] | Base Rate [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 0.25%    
CCH Working Capital Facility [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 1.75%    
CCH Working Capital Facility [Member] | Maximum [Member] | Base Rate [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 0.75%    
CCH [Member] | CCH Working Capital Facility [Member]      
Line of Credit Facility [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity   $ 1,200,000,000 $ 350,000,000
Debt Instrument, Description of Variable Rate Basis LIBOR or the base rate    
Line Of Credit Facility, Unused Capacity, Commitment Fee Percentage Of Margin On Undrawn Commitment 40.00%    
Debt Issuance Costs, Required Fees to Agents and Lenders $ 14,000,000    
Maturity date Jun. 29, 2023    
CCH [Member] | CCH Working Capital Facility [Member] | Base Rate [Member] | Drawn Portion [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 2.00%    
CCH [Member] | CCH Working Capital Facility [Member] | Base Rate Determination Federal Funds Rate [Member] | Base Rate [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 0.50%    
CCH [Member] | CCH Working Capital Facility [Member] | Base Rate Determination LIBOR [Member] | Base Rate [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 0.50%    
CCH [Member] | CCH Working Capital Facility [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 1.25%    
CCH [Member] | CCH Working Capital Facility [Member] | Minimum [Member] | Base Rate [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 0.25%    
CCH [Member] | CCH Working Capital Facility [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 1.75%    
CCH [Member] | CCH Working Capital Facility [Member] | Maximum [Member] | Base Rate [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 0.75%    
CCH [Member] | CCH Letter of Credit [Member] | Portion issued and not drawn [Member]      
Line of Credit Facility [Line Items]      
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.20%    
CCH [Member] | CCH Revolving Loans [Member]      
Line of Credit Facility [Line Items]      
Line of Credit Facility, Number of Business Days Notice Required for Repayment of Debt Without Penalty 3 days    
CCH [Member] | CCH LC Loan [Member] | Maximum [Member]      
Line of Credit Facility [Line Items]      
Debt Instrument, Term 1 year    
CCH [Member] | CCH Working Capital Loan [Member]      
Line of Credit Facility [Line Items]      
Line of Credit Facility, Annual Temporary Requirement, Balance, Outstanding Principal $ 0    
Line of Credit Facility, Annual Temporary Requirement, Period, Number of Consecutive Business Days 5 days