Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v3.21.2
Basis of Presentation (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Dec. 30, 2020
Dec. 31, 2018
General business information            
Dividends paid to noncontrolling interest   $ 46 $ 46      
Note receivable - related party (note 1) $ 1,825 $ 1,825   $ 1,825 $ 1,800  
Receivable with Imputed Interest, Effective Yield (Interest Rate)   0.48%        
Interest Income, Related Party 2 $ 6        
Revolving Credit Facility [Member]            
General business information            
Line of Credit Facility, Maximum Borrowing Capacity           $ 2,950
Revolving Credit Facility [Member] | Tranche One, Shared with Related Party            
General business information            
Line of Credit Facility, Maximum Borrowing Capacity $ 400 $ 400       $ 400
QVC-Japan            
General business information            
Investment Owned, Percent of Net Assets 60.00% 60.00%        
QVC-Japan | Mitsui [Domain]            
General business information            
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 40.00% 40.00%        
CNR Home Shopping Co., Ltd.            
General business information            
Equity Method Investment, Ownership Percentage 49.00% 49.00%        
zulily, llc [Member]            
General business information            
Long-term Line of Credit $ 120 $ 120        
QVC to Zulily allocated expenses [Member] | zulily, llc [Member]            
General business information            
Related Party Transaction, Amounts of Transaction   6 6      
Zulily to QVC allocated expenses [Member] | zulily, llc [Member]            
General business information            
Related Party Transaction, Amounts of Transaction   6 8      
QVC to Zulily loan [Member] | zulily, llc [Member]            
General business information            
Line of Credit Facility, Maximum Borrowing Capacity $ 100 $ 100        
Line of Credit Facility, Interest Rate Description   variable interest rate equal to the London Interbank Offered Rate ("LIBOR") rate plus an applicable margin rate        
QVC to CBI Allocated Expenses [Member] | Cornerstone Brands Inc [Member]            
General business information            
Related Party Transaction, Expenses from Transactions with Related Party   $ 16 18      
CBI to QVC allocated expenses [Member] | Cornerstone Brands Inc [Member]            
General business information            
Related Party Transaction, Expenses from Transactions with Related Party   $ 1 $ 1