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Financial Statements of Guarantors (Narrative) (Details) (USD $)
In Billions, unless otherwise specified
Jun. 30, 2011
QCII Guaranteed Notes [Member]
 
Debt instrument principal outstanding $ 2.7
QCII Guaranteed Notes [Member] | Registered Debt Securities [Member]
 
Debt instrument principal outstanding 1.3
QCF Guaranteed Notes [Member] | Registered Debt Securities [Member]
 
Debt instrument principal outstanding $ 1.0
QCII [Member]
 
Ownership percentage 100.00%