XML 46 R59.htm IDEA: XBRL DOCUMENT v2.4.1.9
Contingencies (Details) (Atlas Unitholder Litigation [Member])
 3 Months Ended 2 Months Ended
Dec. 31, 2014
Unitholder
Nov. 30, 2014
Unitholder
Atlas Pipeline Partners [Member]
    
Loss Contingencies [Line Items]    
Number of public unitholders 5us-gaap_LossContingencyNumberOfPlaintiffs
/ us-gaap_BusinessAcquisitionAxis
= trgp_AtlasPipelinePartnersLPAcquisitionMember
/ us-gaap_LitigationCaseAxis
= trgp_AtlasUnitholderLitigationMember		  
Atlas Energy [Member]
    
Loss Contingencies [Line Items]    
Number of public unitholders   2us-gaap_LossContingencyNumberOfPlaintiffs
/ us-gaap_BusinessAcquisitionAxis
= trgp_AtlasEnergyLPAcquisitionMember
/ us-gaap_LitigationCaseAxis
= trgp_AtlasUnitholderLitigationMember