XML 84 R108.htm IDEA: XBRL DOCUMENT v2.4.1.9
Intangible Assets and Goodwill (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Nov. 18, 2014
Intangible Assets And Goodwill        
Amortization expense on intangibles $ 4us-gaap_AmortizationOfIntangibleAssets $ 1us-gaap_AmortizationOfIntangibleAssets $ 1us-gaap_AmortizationOfIntangibleAssets  
Finite-Lived Intangible Assets, Future Amortization Expense        
2015 4us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths      
2016 4us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo      
2017 4us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree      
2018 3us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour      
2019 3us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive      
Goodwill [Line Items]        
Goodwill 383us-gaap_Goodwill 361us-gaap_Goodwill 361us-gaap_Goodwill  
Acquired Communications Software Provider        
Goodwill [Line Items]        
Gross purchase price   48us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= msi_CommunicationSoftwareProviderMember
   
Goodwill   22us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= msi_CommunicationSoftwareProviderMember
   
identifiable intangible assets   20us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= msi_CommunicationSoftwareProviderMember
   
Acquired Equipment Provider        
Goodwill [Line Items]        
Gross purchase price       22us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= msi_EquipmentProviderMember
Net tangible assets       3msi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetTangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= msi_EquipmentProviderMember
Other assets | Acquired Equipment Provider        
Goodwill [Line Items]        
Gross purchase price $ 19us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_BusinessAcquisitionAxis
= msi_EquipmentProviderMember