Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013	Jun. 30, 2013 Selling, General, And Administrative Expenses [Member]	Jun. 30, 2012 Selling, General, And Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Percentage of weighted average cost of capital			15.00%
Severance and acceleration of equity awards contract obligations	$ 0.7	$ 1.5	$ 1.8
Net impact of quarterly re-evaluation and accretion of liability expenses				1.0	0.8
Savings in general and administrative costs			$ 2