Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangibles (Details 3)

v2.4.1.9
Goodwill and Other Intangibles (Details 3) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount $ 250.5us-gaap_FiniteLivedIntangibleAssetsGross $ 241.6us-gaap_FiniteLivedIntangibleAssetsGross  
Accumulated Amortization (236.5)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization (234.4)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization  
Amortization expense for intangibles 2.9us-gaap_AmortizationOfIntangibleAssets 2.7us-gaap_AmortizationOfIntangibleAssets 4.1us-gaap_AmortizationOfIntangibleAssets
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]      
2015 3us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths    
2016 2us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo    
2017 2us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree    
2018 2us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour    
2019 1us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive    
Customer relationships [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 234.8us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
227.6us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
 
Accumulated Amortization (223.5)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
(221.4)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
 
Other Intangible Assets [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Amount 15.7us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember
14.0us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember
 
Accumulated Amortization $ (13.0)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember
$ (13.0)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember