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Other Comprehensive Income (Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Foreign currency translation adjustments      
Beginning balance $ (224) $ (140) $ (39)
Other comprehensive income attributable to QVC, Inc. stockholder 131 (84) (101)
Ending balance (93) (224) (140)
AOCL      
Beginning balance (224) (140) (39)
Other comprehensive income attributable to QVC, Inc. stockholder 131 (84) (101)
Ending balance $ (93) $ (224) $ (140)