Summary of Significant Accounting Policies Summary of Significant Accounting Policies, Reserves (Details)	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Percentage of general liability and workers compensation reserves to total liabilities (in hundredths)	0.30%	0.20%

The percentage of general liability and workers compensation reserves to total liabilities.

No definition available.

Name:	cnl_Percentageofgeneralliabilityandworkerscompensationreservestototalliabilities
Namespace Prefix:	cnl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant