Annual report pursuant to Section 13 and 15(d)

Fair Value Disclosures (Financial Assets And Liabilities Measured At Fair Value) (Details)

v2.4.0.6
Fair Value Disclosures (Financial Assets And Liabilities Measured At Fair Value) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets: SERP $ 1.7 $ 1.7
Liabilities: Derivatives 0 1.5
Level 1 [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets: SERP 0 0
Liabilities: Derivatives 0 0
Level 2 [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets: SERP 1.7 1.7
Liabilities: Derivatives 0 1.5
Level 3 [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets: SERP 0 0
Liabilities: Derivatives $ 0 $ 0