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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