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Multiemployer Pension Plans (Detail) (Steelworkers Pension Trust, USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Steelworkers Pension Trust
     
Multiemployer Plans [Line Items]      
Employer Identification Number / Plan Number 23-6648508 / 499    
PPA Zone Status Green Green  
Funding Plan Pending / Implemented No    
Contributions by Dana $ 9 $ 8 $ 9
Surcharge Imposed No