v2.4.1.9
INCOME TAXES (Details 5) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Tax credits    
Deferred tax liability related to foreign subsidiaries $ 68.2us-gaap_UndistributedEarningsOfForeignSubsidiaries $ 78.8us-gaap_UndistributedEarningsOfForeignSubsidiaries
Investment tax credits    
Tax credits    
Tax credit Carryover 1.2us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_TaxCreditCarryforwardAxis
= us-gaap_InvestmentCreditMember
 
U.S. state    
Tax credits    
Tax credit Carryover 19.9us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember
 
Foreign | Canada    
Tax credits    
Tax credit Carryover 10.8us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Foreign | Investment tax credits | Canada    
Tax credits    
Tax credit Carryover $ 4.8us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
/ us-gaap_StatementGeographicalAxis
= country_CA
/ us-gaap_TaxCreditCarryforwardAxis
= us-gaap_InvestmentCreditMember