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

Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation Plans and Awards (Details)

Stock-based Compensation Plans and Awards (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended			3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	1 Months Ended	6 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012 Stock Options	Jul. 31, 2011 Stock Options	Jul. 31, 2012 Stock Options	Jul. 31, 2011 Stock Options	Jan. 31, 2012 Stock Options	Jul. 31, 2011 Stock Options Black-Scholes option pricing model	Jul. 31, 2012 Stock Options Black-Scholes option pricing model	Jul. 31, 2011 Stock Options Black-Scholes option pricing model	Jul. 31, 2011 Stock Options Minimum Black-Scholes option pricing model	Jul. 31, 2011 Stock Options Minimum Black-Scholes option pricing model	Jul. 31, 2011 Stock Options Maximum Black-Scholes option pricing model	Jul. 31, 2011 Stock Options Maximum Black-Scholes option pricing model	Jul. 31, 2012 Restricted stock units	Jul. 31, 2012 Restricted stock units	Mar. 31, 2012 Non-statutory stock options Mr. Joseph Kennedy	Jul. 31, 2012 Non-statutory stock options Mr. Joseph Kennedy	Jul. 31, 2012 Non-statutory stock options Mr. Joseph Kennedy Monte-Carlo simulation option pricing model	Jul. 31, 2012 Non-statutory stock options Minimum Mr. Joseph Kennedy	Jul. 31, 2011 Non-statutory stock options Minimum Mr. Joseph Kennedy	Jul. 31, 2012 2011 Plan
Stock-based Compensation Plans and Awards
Annual fixed increase alternative, increase in shares of common stock reserved for issuance																								10,000,000
Annual percentage increase alternative, increase in common stock reserved for issuance as a percentage of common stock outstanding																								4.00%
Percentage of outstanding shares of common stock added to the number of shares in the reserve																								4.00%
Assumptions used to calculate per-share fair value of stock option at the date of grant
Expected life											6 years 8 months 1 day		5 years 9 months 25 days	5 years 8 months 23 days	6 years 29 days	7 years 7 days					10 years
Risk-free interest rate, minimum (as a percent)										1.70%		1.70%
Risk-free interest rate, maximum (as a percent)										2.78%		3.30%
Risk-free interest rate (as a percent)											1.52%										2.33%
Expected volatility, minimum (as a percent)												54.00%
Expected volatility, maximum (as a percent)												57.00%
Expected volatility (as a percent)										54.00%	57.00%										70.00%
Stock price (in dollars per share)																					$ 10.63
Options Outstanding Stock Options
Balance at the beginning of the period (in shares)							34,810,926
Granted (in shares)							1,350,000												800,000
Exercised (in shares)							(4,732,848)
Cancelled (in shares)							(991,217)
Balance at the end of the period (in shares)					30,436,861		30,436,861
Weighted-Average Exercise Price
Balance at the beginning of the period (in dollars per share)							$ 2.43
Granted (in dollars per share)							$ 10.63
Exercised (in dollars per share)							$ 0.75
Cancelled (in dollars per share)							$ 4.67
Balance at the end of the period (in dollars per share)					$ 2.99		$ 2.99
Aggregate Intrinsic Value
Aggregate intrinsic value (in dollars)					$ 223,993,000		$ 223,993,000		$ 379,355,000
Additional disclosure, stock options
Equity awards available for grant at the end of the period (in shares)					14,274,993		14,274,993
Vesting period																		4 years		4 years
Stock-based compensation expense	6,037,000	2,128,000	11,537,000	3,064,000													2,300,000	4,100,000
Total compensation cost not yet recognized related to non-vested RSUs																	37,400,000	37,400,000
Period over which unrecognized compensation expense is expected to be recognized							2 years 6 months											3 years 4 months 24 days			4 years 10 months 24 days
Number of Shares
Unvested at the beginning of the period (in shares)																		1,426,975
Granted (in shares)																		2,265,800
Vested (in shares)																		(4,200)
Cancelled (in shares)																		(97,733)
Unvested at the end of the period (in shares)																	3,590,842	3,590,842
Weighted-Average Grant-Date Fair Value
Unvested at the beginning of the period (in dollars per share)																		$ 12.03
Granted (in dollars per share)																		$ 11.76
Vested (in dollars per share)																		$ 17.78
Cancelled (in dollars per share)																		$ 12.73
Unvested at the end of the period (in dollars per share)																	$ 11.83	$ 11.83
Period of time that the trailing weighted average stock price must exceed a certain price for the stock award to vest, prior to July 6, 2017																				60 days
Share price, under a sale of the entity, that must be obtained for the stock award to vest (in dollars per share) prior to July, 6, 2017																						$ 21.00
Share price that must be obtained for the stock award to vest (in dollars per share) prior to July, 6, 2017																							$ 21.00
Weighted-average fair value of stock option granted (in dollars per share)						$ 8.58	$ 6.02	$ 4.50													$ 6.08
Total compensation cost related to stock options granted, but not yet recognized					40,500,000		40,500,000														4,300,000
Total grant date fair value of stock options vested					4,600,000	1,100,000	8,000,000	1,800,000
Aggregate intrinsic value					$ 19,200,000	$ 23,200,000	$ 51,600,000	$ 27,500,000