Pension And Other Post-Retirement Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Other Post-Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension benefit payment amount	$ 0.2
Estimated additional payments in 2012	0.6
Funded Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Anticipated contribution to plans	18.0
Unfunded Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension benefit payment amount	0.4
Estimated additional payments in 2012	$ 2.6