Pension And Other Postretirement Benefit Plans (Narrative) (Details) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Pension Benefits [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plans contribution by the company	$ 16.1	$ 39.4
Defined benefit plans contribution by the company	18
Other Postretirement Benefits [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plans contribution by the company	1.0	1.1
Defined benefit plans contribution by the company	$ 1