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Leases and Commitments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Rent expense $ 125.1 $ 133.1 $ 126.1
Estimated cost of plant construction, expansion and modernization projects $ 91.8