Information About Liberty's Operating Segments (Performance Measures By Segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Total revenues	$ 3,179	$ 2,196	$ 2,365	$ 2,314	$ 3,079	$ 2,133	$ 2,245	$ 2,159	$ 10,054	$ 9,616	$ 8,932
Adjusted OIBDA									1,900	1,823	1,746
Interactive Group [Member]
Total revenues									10,018	9,616	8,932
Adjusted OIBDA									1,897	1,827	1,749
Interactive Group [Member] | QVC [Member]
Total revenues									8,516	8,268	7,807
Adjusted OIBDA									1,828	1,733	1,671
Interactive Group [Member] | Corporate And Other [Member]
Total revenues									0	0	0
Adjusted OIBDA									(27)	(29)	(25)
Interactive Group [Member] | E-commerce [Member]
Total revenues									1,502	1,348	1,125
Adjusted OIBDA									96	123	103
Ventures Group [Member]
Total revenues									36	0	0
Adjusted OIBDA									3	(4)	(3)
Ventures Group [Member] | Corporate And Other [Member]
Total revenues									0	0	0
Adjusted OIBDA									(5)	(4)	(3)
Ventures Group [Member] | TripAdvisor, Inc. [Member]
Total revenues									36	0	0
Adjusted OIBDA									$ 8	$ 0	$ 0