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

Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details Textual)

Stockholders' Equity (Details Textual) (USD $)	1 Months Ended				3 Months Ended			9 Months Ended					9 Months Ended		1 Months Ended	9 Months Ended
Stockholders' Equity (Details Textual) (USD $)	Oct. 31, 2011	Feb. 28, 2011	Jul. 31, 2008	Jan. 31, 2004	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2009	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 Series A Convertible Preferred Stock [Member]	Dec. 31, 2011 Series A Convertible Preferred Stock [Member]	Sep. 30, 2012 Series B Preferred Stock [Member]	Dec. 31, 2011 Series B Preferred Stock [Member]	Sep. 30, 2012 Liberty Media [Member] Series B Preferred Stock [Member]	Sep. 30, 2012 Liberty Media [Member] Series B Preferred Stock [Member]	Mar. 31, 2009 Liberty Media [Member] Series B Preferred Stock [Member]
Additional Stockholder's Equity (Textual) [Abstract]
Common stock, shares authorized (in shares)					9,000,000,000			9,000,000,000		9,000,000,000
Common stock, shares issued (in shares)					5,192,364,730			5,192,364,730		3,753,201,929
Common stock, shares outstanding (in shares)					5,192,364,730			5,192,364,730		3,753,201,929
Common stock reserved for issuance (in shares)					1,954,599,000			1,954,599,000
Number of common shares exchanged under share lending agreements (in shares)			262,400,000
Exchange fee per common share for loaned shares (in dollars per share)			$ 0.001
Number of share common shares returned on common stock borrowed (in shares)	202,400,000						60,000,000
Amortization of costs related to share-lending arrangement and other issuance costs					$ 3,139,000	$ 1,276,000		$ 9,181,000	$ 6,727,000
Unamortized, debt issuance costs					30,873,000			30,873,000		40,054,000
Unamortized, debt issuance costs recorded in deferred financing fees, net					30,256,000			30,256,000		39,253,000
Unamortized, debt issuance costs recorded in long-term related party assets					617,000			617,000		801,000
Service Agreement, contract term with sports programming provider				7 years
Common stock delivered under seven agreement with programming provider (in shares)				15,173,070
Value of common stock delivered under agreement with sports programming provider				40,967,000
Share-based payment expense related to seven year agreement with sports programming provider									1,568,000
Undesignated preferred stock, shares authorized (in shares)					50,000,000			50,000,000		50,000,000
Preferred stock, shares issued (in shares)											0	0	6,250,100	12,500,000			12,500,000
Preferred stock, shares outstanding (in shares)											0	0	6,250,100	12,500,000
Number of shares of common stock into which Series B Preferred Stock is convertible (in shares)													(6,249,900)		(6,249,900)	1,293,467,684
The rate Series B Preferred Stock is convertible into shares of our common stock (in shares)													206.9581409
Percentage of shares Liberty Media would own of our common stock after conversion of Series B Preferred Stock													20.00%
Number of outstanding warrants to acquire common stock (in shares)					22,506,000			22,506,000		22,506,000
Average exercise price of warrant (in dollars per share)					2.63			2.63		2.63
Warrants issuance related expense					$ 0	$ 0		$ 0	$ 0
Warrants exercised to purchase common stock (in shares)		16,500,000
Issuance of shares of common stock resulting from the exercise of warrants based on the exercise price (in shares)		7,122,951