Quarterly report pursuant to Section 13 or 15(d)

Earnings per Share - Additional Information (Details)

v2.4.1.9
Earnings per Share - Additional Information (Details)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Earnings Per Share [Abstract]    
Participating securities 0siri_ParticipatingSecurities 0siri_ParticipatingSecurities
Anti-dilutive common stock equivalents (in shares) 105,796,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 386,975,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount