Employee Benefit Plans (Composition Of Domestic Pension Plan Assets) (Details) (Pension Benefits, Domestic [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 234.6	$ 221.6	$ 204.3
Fair Value Measurements Of Plan Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	93.3	136.5
Fair Value Measurements Of Plan Assets, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	128.0	70.1
Fair Value Measurements Of Plan Assets, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13.3	15.0	7.8
Equity Securities And Funds, Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	39.0	46.0
Equity Securities And Funds, Domestic [Member] | Fair Value Measurements Of Plan Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7.3	46.0
Equity Securities And Funds, Domestic [Member] | Fair Value Measurements Of Plan Assets, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	31.7
Equity Securities And Funds, Domestic [Member] | Fair Value Measurements Of Plan Assets, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Equity Securities And Funds, International [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	41.2	34.0
Equity Securities And Funds, International [Member] | Fair Value Measurements Of Plan Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		16.7
Equity Securities And Funds, International [Member] | Fair Value Measurements Of Plan Assets, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	41.2	17.3
Equity Securities And Funds, International [Member] | Fair Value Measurements Of Plan Assets, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fixed Income Securities And Funds, Investment-Grade [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	60.7	42.4
Fixed Income Securities And Funds, Investment-Grade [Member] | Fair Value Measurements Of Plan Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	60.7	35.9
Fixed Income Securities And Funds, Investment-Grade [Member] | Fair Value Measurements Of Plan Assets, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6.5
Fixed Income Securities And Funds, Investment-Grade [Member] | Fair Value Measurements Of Plan Assets, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Fixed Income Securities And Funds, High-Yield [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12.3	11.9
Fixed Income Securities And Funds, High-Yield [Member] | Fair Value Measurements Of Plan Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0.2
Fixed Income Securities And Funds, High-Yield [Member] | Fair Value Measurements Of Plan Assets, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12.3	11.7
Fixed Income Securities And Funds, High-Yield [Member] | Fair Value Measurements Of Plan Assets, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Alternative Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	77.3	69.2
Alternative Investments [Member] | Fair Value Measurements Of Plan Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	22.5	21.0
Alternative Investments [Member] | Fair Value Measurements Of Plan Assets, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	42.8	34.6
Alternative Investments [Member] | Fair Value Measurements Of Plan Assets, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12.0	13.6
Cash And Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4.1	18.1
Cash And Other [Member] | Fair Value Measurements Of Plan Assets, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2.8	16.7
Cash And Other [Member] | Fair Value Measurements Of Plan Assets, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Cash And Other [Member] | Fair Value Measurements Of Plan Assets, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1.3	$ 1.4