Pension And Postretirement Benefits (Schedule Of Fair Value Of Company Pension Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	$ 808.5	$ 816.5
Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	128.1	139.4
Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	45.3	47.1
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	21.7	19.0
NAV Practical Expedient	613.4	611.0
Cash and Money Markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	16.1	4.9
Cash and Money Markets [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	16.1	4.9
Common Stocks Actively Managed U.S. Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	112.0	134.5
Common Stocks Actively Managed U.S. Equities [Member] | Quoted Prices In Active Markets For Identical Assets Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	112.0	134.5
Fixed Income Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	44.3	46.1
Fixed Income Investments [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	44.3	46.1
U.S. Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	62.3	49.9
NAV Practical Expedient	62.3	49.9
U.S. Equity Funds [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	0.0	0.0
Non-U.S. Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	201.9	218.6
NAV Practical Expedient	201.9	218.6
Non-U.S. Equity Funds [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	0.0	0.0
U.S. Fixed Income, Government and Corporate [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	12.4	11.5
NAV Practical Expedient	12.4	11.5
U.S. Fixed Income, Government and Corporate [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	0.0	0.0
Non-U.S. Fixed Income, Government And Corporate [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	165.3	157.2
NAV Practical Expedient	165.3	157.2
Non-U.S. Fixed Income, Government And Corporate [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	0.0	0.0
International Balanced Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	10.1	10.1
NAV Practical Expedient	10.1	10.1
International Balanced Funds [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	0.0	0.0
CollectiveTrust [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	39.1
NAV Practical Expedient	17.4	17.1
CollectiveTrust [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	0.0
CollectiveTrust [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	21.7	19.0
collectivetrustfund [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value		36.1
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value		102.3
NAV Practical Expedient	106.4	102.3
Hedge Funds [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	0.0	0.0
International Property Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	106.4	44.3
International Property Funds [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	0.0	0.0
Commodities Fund [Member] [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	37.6
Commodities Fund [Member] [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
NAV Practical Expedient	37.6	44.3
Annuity Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	1.0	1.0
Annuity Contract [Member] | Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value	$ 1.0	$ 1.0