Annual report pursuant to Section 13 and 15(d)

Debt - 2015 CCH Credit Facility (Details)

v3.8.0.1
Debt - 2015 CCH Credit Facility (Details) - 2015 CCH Credit Facility [Member]
 12 Months Ended
Dec. 31, 2017
Rate
Line of Credit Facility [Line Items]  
Debt Instrument, Description of Variable Rate Basis LIBOR or base rate [1]
London Interbank Offered Rate (LIBOR) [Member]  
Line of Credit Facility [Line Items]  
Debt Instrument, Basis Spread on Variable Rate 2.25% [1]
Base Rate [Member]  
Line of Credit Facility [Line Items]  
Debt Instrument, Basis Spread on Variable Rate 1.25% [1]
CCH [Member]  
Line of Credit Facility [Line Items]  
Line of Credit Facility, Date of First Quarterly Payment, Number of Months Following Project Completion 3 months
Line Of Credit Facility, Amortization Period 19 years
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 40.00%
Debt Instrument, Balance Required in Reserve Account, Period of Debt Service 6 months
CCH [Member] | London Interbank Offered Rate (LIBOR) [Member]  
Line of Credit Facility [Line Items]  
Debt Instrument, Basis Spread on Variable Rate 2.25%
CCH [Member] | London Interbank Offered Rate (LIBOR) [Member] | Completion of Trains 1 and 2 of the CCL Project [Member]  
Line of Credit Facility [Line Items]  
Debt Instrument, Basis Spread on Variable Rate 2.50%
CCH [Member] | Base Rate [Member]  
Line of Credit Facility [Line Items]  
Debt Instrument, Basis Spread on Variable Rate 1.25%
CCH [Member] | Base Rate [Member] | Completion of Trains 1 and 2 of the CCL Project [Member]  
Line of Credit Facility [Line Items]  
Debt Instrument, Basis Spread on Variable Rate 1.50%
CCH [Member] | Minimum [Member]  
Line of Credit Facility [Line Items]  
Debt Instrument, Fixed Charge, Coverage Ratio, Projected 1.55
Percentage of Debt Hedged by Interest Rate Derivatives 65.00%
Debt Instrument, Fixed Charge, Coverage Ratio 1.25
[1] There is a 0.25% step-up for both LIBOR and base rate loans following the completion of Trains 1 and 2 of the CCL Project as defined in the common terms agreement.