Commitments And Contingent Liabilities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Loss Contingencies [Line Items]
Residual value of guarantees	$ 1.9
Liabilities under capital lease obligations	0
Operating leases, rental expense	26.7	25.2	28.7
Waste disposed accrued liability	9.2	6.9
Contingency reserve for litigation	$ 23.1
Maximum [Member]
Loss Contingencies [Line Items]
Time-frame over which the accrued amounts may be paid out, in years	20
Minimum [Member]
Loss Contingencies [Line Items]
Time-frame over which the accrued amounts may be paid out, in years	15