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Employee Benefit Plans And Other Postretirement Benefits (Schedule Of Pension Plans With PBO And ABO In Excess Of Fair value Of Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
PBO [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
PBO	$ 1,530.0	$ 1,351.6
Fair value of plan assets	1,253.9	1,105.5
Number of plans	4	4
ABO [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
ABO	1,436.8	1,280.8
Fair value of plan assets	$ 1,253.9	$ 1,105.5
Number of plans	4	4

If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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- Definition

If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details