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Income Taxes (Details 2) (QSC, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
QSC
Income taxes
Amount paid to QSC	$ 750	$ 607	$ (211)

X

- Details

Name:	ctq_IncomeTaxDisclosureLineItems
Namespace Prefix:	ctq_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the amount related to income taxes paid to related party.

+ References

No definition available.

+ Details

Name:	ctq_IncomeTaxesAmountPaidtoAffiliates
Namespace Prefix:	ctq_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration