Sirius XM Holdings Inc. Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment (Details 2)	9 Months Ended
Property and Equipment (Details 2)	Sep. 30, 2012
SIRIUS FM-1 [Member]
Summary of orbiting satellites
Orbiting satellites, year delivered	2000
Orbiting satellites, estimated end of depreciable life	2013
SIRIUS FM-2 [Member]
Summary of orbiting satellites
Orbiting satellites, year delivered	2000
Orbiting satellites, estimated end of depreciable life	2013
SIRIUS FM-3 [Member]
Summary of orbiting satellites
Orbiting satellites, year delivered	2000
Orbiting satellites, estimated end of depreciable life	2015
SIRIUS FM-5 [Member]
Summary of orbiting satellites
Orbiting satellites, year delivered	2009
Orbiting satellites, estimated end of depreciable life	2024
XM-1 [Member]
Summary of orbiting satellites
Orbiting satellites, year delivered	2001
Orbiting satellites, estimated end of depreciable life	2013
XM-2 [Member]
Summary of orbiting satellites
Orbiting satellites, year delivered	2001
Orbiting satellites, estimated end of depreciable life	2013
XM-3 [Member]
Summary of orbiting satellites
Orbiting satellites, year delivered	2005
Orbiting satellites, estimated end of depreciable life	2020
XM-4 [Member]
Summary of orbiting satellites
Orbiting satellites, year delivered	2006
Orbiting satellites, estimated end of depreciable life	2021
XM-5 [Member]
Summary of orbiting satellites
Orbiting satellites, year delivered	2010
Orbiting satellites, estimated end of depreciable life	2025