Long-Term Debt (Narrative) (Details) (USD $)	9 Months Ended				9 Months Ended					0 Months Ended	9 Months Ended																																		9 Months Ended																	3 Months Ended						0 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013 QVC Bank Credit Facilities [Member]	Sep. 30, 2013 3.25% Exchangeable Senior Debentures Due 2031 [Member]	Sep. 30, 2013 1% Exchangeable Senior Debentures due 2043 [Member]	Mar. 18, 2013 QVC 4.375% Senior Secured Notes due 2023 [Member]	Sep. 30, 2013 QVC Bank Credit Facilities [Member]	Mar. 18, 2013 QVC 5.95% Senior Secured Notes due 2043 [Member]	Apr. 09, 2013 0.75% Exchangeable Senior Debentures due 2043 [Member]	Sep. 30, 2013 Margin over base rate [Member] QVC Bank Credit Facilities [Member] Alternate Base Rate [Member]	Sep. 30, 2013 Margin over LIBOR rate [Member] QVC Bank Credit Facilities [Member] LIBOR loan [Member]	Sep. 30, 2013 Interactive Group [Member]	Sep. 30, 2012 Interactive Group [Member]	Dec. 31, 2012 Interactive Group [Member]	Sep. 30, 2013 Interactive Group [Member] 1% Exchangeable Senior Debentures due 2043 [Member]	Dec. 31, 2012 Interactive Group [Member] 1% Exchangeable Senior Debentures due 2043 [Member]	Sep. 30, 2013 Interactive Group [Member] Subsidiary Debt [Member]	Dec. 31, 2012 Interactive Group [Member] Subsidiary Debt [Member]	Sep. 30, 2013 Interactive Group [Member] QVC 5.95% Senior Secured Notes due 2043 [Member]	Dec. 31, 2012 Interactive Group [Member] QVC 5.95% Senior Secured Notes due 2043 [Member]	Sep. 30, 2013 Interactive Group [Member] QVC 7.375% Senior Secured Notes Due 2020 [Member]	Dec. 31, 2012 Interactive Group [Member] QVC 7.375% Senior Secured Notes Due 2020 [Member]	Sep. 30, 2013 Interactive Group [Member] 5.7% Senior Notes Due 2013 [Member]	Dec. 31, 2012 Interactive Group [Member] 5.7% Senior Notes Due 2013 [Member]	Sep. 30, 2013 Interactive Group [Member] QVC 7.5% Senior Secured Notes Due 2019 [Member]	Mar. 31, 2013 Interactive Group [Member] QVC 7.5% Senior Secured Notes Due 2019 [Member]	Mar. 04, 2013 Interactive Group [Member] QVC 7.5% Senior Secured Notes Due 2019 [Member]	Dec. 31, 2012 Interactive Group [Member] QVC 7.5% Senior Secured Notes Due 2019 [Member]	Sep. 30, 2013 Interactive Group [Member] QVC 4.375% Senior Secured Notes due 2023 [Member]	Dec. 31, 2012 Interactive Group [Member] QVC 4.375% Senior Secured Notes due 2023 [Member]	Sep. 30, 2013 Interactive Group [Member] 8.25% Senior Debentures Due 2030 [Member]	Dec. 31, 2012 Interactive Group [Member] 8.25% Senior Debentures Due 2030 [Member]	Sep. 30, 2013 Interactive Group [Member] QVC Bank Credit Facilities [Member]	Dec. 31, 2012 Interactive Group [Member] QVC Bank Credit Facilities [Member]	Sep. 30, 2013 Interactive Group [Member] QVC 5.125% Senior Secured Notes 2022 [Member]	Dec. 31, 2012 Interactive Group [Member] QVC 5.125% Senior Secured Notes 2022 [Member]	Sep. 30, 2013 Interactive Group [Member] 8.5% Senior Debentures Due 2029 [Member]	Dec. 31, 2012 Interactive Group [Member] 8.5% Senior Debentures Due 2029 [Member]	Sep. 30, 2013 Interactive Group [Member] QVC 7.125% Senior Secured Notes Due 2017 [Member]	Mar. 31, 2013 Interactive Group [Member] QVC 7.125% Senior Secured Notes Due 2017 [Member]	Mar. 15, 2013 Interactive Group [Member] QVC 7.125% Senior Secured Notes Due 2017 [Member]	Mar. 04, 2013 Interactive Group [Member] QVC 7.125% Senior Secured Notes Due 2017 [Member]	Dec. 31, 2012 Interactive Group [Member] QVC 7.125% Senior Secured Notes Due 2017 [Member]	Sep. 30, 2013 Ventures Group [Member]	Sep. 30, 2012 Ventures Group [Member]	Dec. 31, 2012 Ventures Group [Member]	Sep. 30, 2013 Ventures Group [Member] 0.75% Exchangeable Senior Debentures due 2043 [Member]	Dec. 31, 2012 Ventures Group [Member] 0.75% Exchangeable Senior Debentures due 2043 [Member]	Sep. 30, 2013 Ventures Group [Member] 3.125% Exchangeable Senior Debentures Due 2023 [Member]	Dec. 31, 2012 Ventures Group [Member] 3.125% Exchangeable Senior Debentures Due 2023 [Member]	Sep. 30, 2013 Ventures Group [Member] 4% Exchangeable Senior Debentures Due 2029 [Member]	Dec. 31, 2012 Ventures Group [Member] 4% Exchangeable Senior Debentures Due 2029 [Member]	Sep. 30, 2013 Ventures Group [Member] 3.75% Exchangeable Senior Debentures Due 2030 [Member]	Dec. 31, 2012 Ventures Group [Member] 3.75% Exchangeable Senior Debentures Due 2030 [Member]	Sep. 30, 2013 Ventures Group [Member] 3.5% Exchangeable Senior Debentures Due 2031 [Member]	Dec. 31, 2012 Ventures Group [Member] 3.5% Exchangeable Senior Debentures Due 2031 [Member]	Sep. 30, 2013 Ventures Group [Member] 3.25% Exchangeable Senior Debentures Due 2031 [Member]	Dec. 31, 2012 Ventures Group [Member] 3.25% Exchangeable Senior Debentures Due 2031 [Member]	Sep. 30, 2013 Ventures Group [Member] TripAdvisor Debt Facilities [Member]	Dec. 31, 2012 Ventures Group [Member] TripAdvisor Debt Facilities [Member]	Sep. 30, 2013 Principal repayment per senior secured note [Member] QVC 7.125% Senior Secured Notes Due 2017 [Member]	Mar. 31, 2013 Principal repayment per senior secured note [Member] QVC 7.125% Senior Secured Notes Due 2017 [Member]	Mar. 31, 2013 Principal repayment per senior secured note [Member] QVC 7.5% Senior Secured Notes Due 2019 [Member]	Jun. 30, 2013 Exchangeable Senior Debentures [Member]	Sep. 30, 2013 HSN, Inc. [Member]	Sep. 30, 2013 HSN, Inc. [Member] 1% Exchangeable Senior Debentures due 2043 [Member]	Apr. 09, 2013 Time Warner Inc [Member] 0.75% Exchangeable Senior Debentures due 2043 [Member]	Apr. 09, 2013 Time Warner Cable Inc [Member] 0.75% Exchangeable Senior Debentures due 2043 [Member]	Sep. 30, 2013 QVC [Member]	Mar. 31, 2013 QVC [Member]
Debt, Current	$ 1,366,000,000		$ 1,638,000,000										$ 439,000,000																																$ 927,000,000
Long-term Debt, Excluding Current Maturities	5,668,000,000		6,246,000,000										4,396,000,000																																1,272,000,000
Debt Instrument Principal amount tendered and retired																																																														1,000	1,000		1,000
Senior Notes							750,000,000		300,000,000
Gains (Losses) on Extinguishment of Debt																																																																						57,000,000
Derivative, Notional Amount																																																																							3,100,000,000
Repayments of Long-term Debt	5,052,000,000	1,238,000,000			414,000,000								2,645,000,000	1,123,000,000																															2,407,000,000	115,000,000
Line of Credit Facility, Maximum Borrowing Capacity								2,000,000,000
standby letters of credit								250,000,000
Incremental borrowing capacity								1,000,000,000
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum											0.25%	1.25%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum											1.00%	2.00%
Line of Credit Facility, Remaining Borrowing Capacity				1,327,000,000
Debt instrument, face amount called for tender																												250,000,000															500,000,000
Debt Instrument, Repurchased Face Amount																											231,000,000														376,000,000	124,000,000
Repayments of Debt																																																														1,035.63	1,039.40	1,120	0
Debt Instrument, Face Amount	7,304,000,000					400,000,000							4,837,000,000			400,000,000		153,000,000		300,000,000		500,000,000		0		769,000,000				750,000,000		505,000,000		673,000,000		500,000,000		287,000,000		0					2,467,000,000			850,000,000		0		439,000,000		439,000,000		363,000,000		0		376,000,000
Long-term Debt	7,034,000,000		7,884,000,000										4,835,000,000		4,542,000,000	413,000,000	0	153,000,000	125,000,000	300,000,000	0	500,000,000	500,000,000	0	240,000,000	760,000,000			988,000,000	750,000,000	0	501,000,000	501,000,000	673,000,000	903,000,000	500,000,000	500,000,000	285,000,000	285,000,000	0				500,000,000	2,199,000,000		3,342,000,000	962,000,000	0	0	1,639,000,000	277,000,000	311,000,000	276,000,000	297,000,000	308,000,000	292,000,000	0	391,000,000	376,000,000	412,000,000
Exchangeable Senior Debentures										850,000,000
Debt instrument interest rate						1.00%				0.75%
Debt instrument, face amount per debenture						1,000				1,000
Debt Conversion, Converted Instrument, Shares Issued																																																																			13.4580	5.1635	6.3040
Common Stock, Dividends, Per Share, Declared																																																																		$ 0.18
Exchangeable Senior Debentures remaining principal outstanding upon partial redemption						$ 100,000,000