Information About Liberty's Operating Segments (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Activities And Reporting Information By Segment [Line Items]
Revenue, Net	$ 1,208	$ 1,284	$ 1,222	$ 1,081	$ 1,095	$ 1,184	$ 1,160	$ 1,011	$ 4,795	$ 4,450	$ 4,002
Adjusted OIBDA									1,628	1,417	1,322
SIRIUS XM
Operating Activities And Reporting Information By Segment [Line Items]
Revenue, Net									4,552	4,141	3,625
Adjusted OIBDA									1,660	1,466	1,289
Corporate And Other
Operating Activities And Reporting Information By Segment [Line Items]
Revenue, Net									243	309	377
Adjusted OIBDA									$ (32)	$ (49)	$ 33