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Accounting Policies (Narrative) (Details)
12 Months Ended
Dec. 31, 2011
yr
Recognition period (in years) for variances between expected and actual rates of returns on plan assets 5
Foreign currency contracts and options mature, within months 18
Long-term supplier contracts, exchange-traded futures and option contracts mature, within months 18
Health care claims cost experience gains or losses recognition period (in years) 4
Health care claims cost experience gains or losses amortization period (in years) 15
Likelihood of being ultimately realized upon settlement 50.00%
Minimum [Member]
 
Expected rates of return 25th percentile
Maximum [Member]
 
Expected rates of return 75th percentile
Machinery and Equipment [Member]
 
Useful life, minimum 5
Useful life, maximum 20
Office Equipment [Member]
 
Useful life, minimum 4
Useful life, maximum 5
Building [Member]
 
Useful life 50
Computer Equipment and Capitalized Software [Member]
 
Useful life, minimum 3
Useful life, maximum 7
Building Improvements [Member]
 
Useful life, minimum 15
Useful life, maximum 25