Annual report pursuant to Section 13 and 15(d)

Goodwill (Details)

v2.4.1.9
Goodwill (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Goodwill [Line Items]      
Impairment loss for goodwill $ 0us-gaap_GoodwillImpairmentLoss $ 0us-gaap_GoodwillImpairmentLoss $ 0us-gaap_GoodwillImpairmentLoss
Accumulated impairment of goodwill since the Merger 4,766,190,000us-gaap_GoodwillImpairedAccumulatedImpairmentLoss    
Goodwill reduced for the exercise and vesting of certain stock awards 0siri_GoodwillReductionDueToExerciseAndVestingOfAwardsAcquiredInBusinessCombination 274,000siri_GoodwillReductionDueToExerciseAndVestingOfAwardsAcquiredInBusinessCombination 19,491,000siri_GoodwillReductionDueToExerciseAndVestingOfAwardsAcquiredInBusinessCombination
Agero, Inc. [Member]      
Goodwill [Line Items]      
Increase in goodwill due to adjustment $ 554,000us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_BusinessAcquisitionAxis
= siri_AgeroInc.Member