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RESTRUCTURING AND ASSET IMPAIRMENT ACTIVITIES (Details 2) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Changes in liabilities established for restructuring programs    
2015 charge $ 1us-gaap_RestructuringCharges $ 2us-gaap_RestructuringCharges
Severance and Related Costs | Corporate Restructuring Programs    
Changes in liabilities established for restructuring programs    
Balance at beginning of period 21us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
/ us-gaap_RestructuringPlanAxis
= chmt_CorporateRestructuringProgramsMember		  
2015 charge 1us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
/ us-gaap_RestructuringPlanAxis
= chmt_CorporateRestructuringProgramsMember		  
Cash payments (12)us-gaap_PaymentsForRestructuring
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
/ us-gaap_RestructuringPlanAxis
= chmt_CorporateRestructuringProgramsMember		  
Balance at end of period $ 10us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
/ us-gaap_RestructuringPlanAxis
= chmt_CorporateRestructuringProgramsMember