Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016
Supplemental Cash Flow Information
Non-cash increase (decrease) in accounts payable and accrued liabilities for changes in unpaid capital expenditures	$ 1.7	$ (0.5)

The increase (decrease) during the reporting period in the liability for capital expenditures incurred but not yet paid.

No definition available.

Name:	ccc_IncreaseDecreaseInUnpaidCapitalExpenditures
Namespace Prefix:	ccc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration