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Related Party and Dow Transactions - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 0 Months Ended 1 Months Ended 12 Months Ended
Jun. 17, 2014
Jun. 30, 2014
Jan. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Related Party Transaction [Line Items]            
Transaction services fees       $ 282.5us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty $ 303.2us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty $ 317.6us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Related party sales       6.5us-gaap_RevenueFromRelatedParties 8.2us-gaap_RevenueFromRelatedParties 9.5us-gaap_RevenueFromRelatedParties
Related party purchases       290.3us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty 274.4us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty 269.1us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty
IPO expenses directly related to the offering 5.1us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts          
Minimum [Member]            
Related Party Transaction [Line Items]            
Percentage of issued and outstanding interest in joint venture       20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		    
Maximum [Member]            
Related Party Transaction [Line Items]            
Percentage of issued and outstanding interest in joint venture       50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		    
Master Outsourcing Services Agreement ("MOSA") [Member]            
Related Party Transaction [Line Items]            
Related party agreement term       5 years    
Second Amended and Restated Master Outsourcing Services Agreement ("SAR MOSA") [Member]            
Related Party Transaction [Line Items]            
Related party effective agreement date       Jun. 01, 2013    
Related party agreement expiration date       Dec. 31, 2020    
Related party agreement notice period for termination       2 years    
notice period for non-renewal to the other party       6 months    
Estimated minimum contractual obligations due in 2015       20.0tse_OtherCommitmentThroughJuneTwoThousandAndFifteen
/ us-gaap_RelatedPartyTransactionAxis
= tse_SecondAmendedAndRestatedMasterOutsourcingServicesAgreementMember		    
Estimated minimum contractual obligations due thereafter       32.0tse_ContractualObligationDueThereafter
/ us-gaap_RelatedPartyTransactionAxis
= tse_SecondAmendedAndRestatedMasterOutsourcingServicesAgreementMember		    
Second Amended and Restated Site Services Agreements ("SAR SSAs") [Member]            
Related Party Transaction [Line Items]            
Related party agreement term       25 years    
Related party effective agreement date       Jun. 01, 2013    
Related party agreement notice period for termination       12 months    
Related party agreement notice period for termination       15 months    
Transaction services fees       233.7us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= tse_SecondAmendedAndRestatedSiteServicesAgreementsMember		 235.1us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= tse_SecondAmendedAndRestatedSiteServicesAgreementsMember		 214.5us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= tse_SecondAmendedAndRestatedSiteServicesAgreementsMember
Second Amended and Restated Site Services Agreements ("SAR SSAs") [Member] | Minimum [Member]            
Related Party Transaction [Line Items]            
Related party contractual commitments period       45 months    
Second Amended and Restated Site Services Agreements ("SAR SSAs") [Member] | Maximum [Member]            
Related Party Transaction [Line Items]            
Related party contractual commitments period       60 months    
Other Agreements [Member]            
Related Party Transaction [Line Items]            
Transaction services fees       48.8us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= tse_OtherAgreementsMember		 68.1us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= tse_OtherAgreementsMember		 103.1us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= tse_OtherAgreementsMember
Dow [Member]            
Related Party Transaction [Line Items]            
Percentage of issued and outstanding interest in joint venture       50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_DowMember		    
Payment for termination of agreement   32.5us-gaap_LossOnContractTermination
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_DowMember		   32.5us-gaap_LossOnContractTermination
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_DowMember		    
Related party sales       343.8us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_DowMember		 294.7us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_DowMember		 311.4us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_DowMember
Related party purchases       2,196.0us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_DowMember		 2,336.5us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_DowMember		 2,654.7us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_DowMember
Related party, Accounts receivable, net of allowance       18.7us-gaap_AccountsReceivableRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_DowMember		 31.6us-gaap_AccountsReceivableRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_DowMember		  
Related party, Accounts payable       156.9us-gaap_AccountsPayableRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_DowMember		 218.9us-gaap_AccountsPayableRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_DowMember		  
Bain Capital [Member]            
Related Party Transaction [Line Items]            
Transaction services fees       27.9us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_BainCapitalMember		 18.6us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_BainCapitalMember		 4.6us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_BainCapitalMember
Payment for termination of agreement   23.3us-gaap_LossOnContractTermination
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_BainCapitalMember		   23.3us-gaap_LossOnContractTermination
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_BainCapitalMember		    
Management fee expenses       2.4us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_BainCapitalMember		 4.7us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_BainCapitalMember		 4.6us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_BainCapitalMember
Transaction Services Agreement, period       10 years    
Percentage of advisory fees       1.00%tse_PercentageOfTransactionServicesFees
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_BainCapitalMember		    
IPO expenses directly related to the offering 2.2us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_BainCapitalMember		          
Debt issuance cost     $ 13.9us-gaap_DebtIssuanceCosts
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tse_BainCapitalMember