Annual report pursuant to Section 13 and 15(d)

Information About Liberty's Operating Segments (Details)

v2.4.1.9
Information About Liberty's Operating Segments (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Operating Activities And Reporting Information By Segment [Line Items]                      
Revenue, Net $ 1,095us-gaap_SalesRevenueNet $ 1,184us-gaap_SalesRevenueNet $ 1,160us-gaap_SalesRevenueNet $ 1,011us-gaap_SalesRevenueNet $ 1,025us-gaap_SalesRevenueNet $ 1,110us-gaap_SalesRevenueNet $ 1,078us-gaap_SalesRevenueNet $ 789us-gaap_SalesRevenueNet $ 4,450us-gaap_SalesRevenueNet $ 4,002us-gaap_SalesRevenueNet $ 368us-gaap_SalesRevenueNet
Adjusted OIBDA                 1,417lmca_AdjustedOibda 1,322lmca_AdjustedOibda 8lmca_AdjustedOibda
SIRIUS XM                      
Operating Activities And Reporting Information By Segment [Line Items]                      
Revenue, Net                 4,141us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= lmca_SiriusXmMember
3,625us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= lmca_SiriusXmMember
 
Adjusted OIBDA                 1,466lmca_AdjustedOibda
/ us-gaap_StatementBusinessSegmentsAxis
= lmca_SiriusXmMember
1,289lmca_AdjustedOibda
/ us-gaap_StatementBusinessSegmentsAxis
= lmca_SiriusXmMember
 
Corporate And Other                      
Operating Activities And Reporting Information By Segment [Line Items]                      
Revenue, Net                 309us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
377us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
368us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
Adjusted OIBDA                 $ (49)lmca_AdjustedOibda
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
$ 33lmca_AdjustedOibda
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
$ 8lmca_AdjustedOibda
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember