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Property, Plant And Equipment (Depreciation And Interest Charges On Property, Plant And Equipment) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property, Plant And Equipment [Abstract]
Depreciation and amortization on PP&E	$ 49.8	$ 44.1	$ 56.9
Interest charges capitalized (in construction in progress)	$ 1.9	$ 1.0	$ 2.4

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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