Pension And Other Postretirement Benefits (Schedule Of Fair Value Of Pension Plan Assets) (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset $ 508.4 $ 516.4  
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 200.3 230.7  
Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 307.9 269.8  
Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 15.3 $ 16.4
Due To Brokers Net [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.3 [1] 0.1 [2]  
Accrued Investment Income Dividends [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.5 0.1  
Receivables/Payables [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   0.6  
Fixed Income Securities [Member] | Other Fixed Income [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.1 0.0
Private Equity Limited Partnerships [Member] | U.S. Multi-Strategy [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 7.3 7.6
Private Equity Limited Partnerships [Member] | International Multi-Strategy [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 4.6 5.0
Private Equity Limited Partnerships [Member] | Distressed Opportunities [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 1.0 $ 1.2
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 294.3 304.8  
Defined Benefit Plan Fair Value Of Plan Assets Before Pending Items 294.3 304.2  
Pension Plan | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan Fair Value Of Plan Assets Before Pending Items 6.2 33.4  
Pension Plan | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan Fair Value Of Plan Assets Before Pending Items 288.1 255.5  
Pension Plan | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan Fair Value Of Plan Assets Before Pending Items 0.0 15.3  
Pension Plan | Cash [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.8 2.2  
Pension Plan | Cash [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.8 2.2  
Pension Plan | Cash [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | Cash [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | International Equities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 51.4 55.0  
Pension Plan | Fixed Income [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 101.5 105.0  
Pension Plan | Equity Securities [Member] | International Equities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 5.4 17.6  
Pension Plan | Equity Securities [Member] | International Equities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 5.4 17.5  
Pension Plan | Equity Securities [Member] | International Equities [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.1  
Pension Plan | Equity Securities [Member] | International Equities [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | Fixed Income Securities [Member] | Government [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 7.1 15.5  
Pension Plan | Fixed Income Securities [Member] | Government [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 13.7  
Pension Plan | Fixed Income Securities [Member] | Government [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 7.1 1.8  
Pension Plan | Fixed Income Securities [Member] | Government [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | Fixed Income Securities [Member] | Corporate [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 10.8 33.6  
Pension Plan | Fixed Income Securities [Member] | Corporate [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | Fixed Income Securities [Member] | Corporate [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 10.8 33.6  
Pension Plan | Fixed Income Securities [Member] | Corporate [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | Fixed Income Securities [Member] | Mortgages/Asset Backed Securities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   0.4  
Pension Plan | Fixed Income Securities [Member] | Mortgages/Asset Backed Securities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   0.0  
Pension Plan | Fixed Income Securities [Member] | Mortgages/Asset Backed Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   0.4  
Pension Plan | Fixed Income Securities [Member] | Mortgages/Asset Backed Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   0.0  
Pension Plan | Fixed Income Securities [Member] | Other Fixed Income [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   0.1  
Pension Plan | Fixed Income Securities [Member] | Other Fixed Income [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   0.0  
Pension Plan | Fixed Income Securities [Member] | Other Fixed Income [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   0.0  
Pension Plan | Fixed Income Securities [Member] | Other Fixed Income [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   0.1  
Pension Plan | Commingled Funds [Member] | U.S. Equities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 115.9 125.2  
Pension Plan | Commingled Funds [Member] | U.S. Equities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | Commingled Funds [Member] | U.S. Equities [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 115.9 125.2  
Pension Plan | Commingled Funds [Member] | U.S. Equities [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | Commingled Funds [Member] | International Equities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 45.7 36.6  
Pension Plan | Commingled Funds [Member] | International Equities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | Commingled Funds [Member] | International Equities [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 45.7 36.6  
Pension Plan | Commingled Funds [Member] | International Equities [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | Commingled Funds [Member] | Short-Term Money Markets [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 25.5 4.3  
Pension Plan | Commingled Funds [Member] | Short-Term Money Markets [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | Commingled Funds [Member] | Short-Term Money Markets [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 25.5 4.3  
Pension Plan | Commingled Funds [Member] | Short-Term Money Markets [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | Commingled Funds [Member] | Fixed Income [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 83.1 53.5  
Pension Plan | Commingled Funds [Member] | Fixed Income [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | Commingled Funds [Member] | Fixed Income [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 83.1 53.5  
Pension Plan | Commingled Funds [Member] | Fixed Income [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Pension Plan | Private Equity Limited Partnerships [Member] | U.S. Multi-Strategy [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset [3]   7.3  
Pension Plan | Private Equity Limited Partnerships [Member] | U.S. Multi-Strategy [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset [3]   0.0  
Pension Plan | Private Equity Limited Partnerships [Member] | U.S. Multi-Strategy [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset [3]   0.0  
Pension Plan | Private Equity Limited Partnerships [Member] | U.S. Multi-Strategy [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset [3]   7.3  
Pension Plan | Private Equity Limited Partnerships [Member] | International Multi-Strategy [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset [4]   4.6  
Pension Plan | Private Equity Limited Partnerships [Member] | International Multi-Strategy [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset [4]   0.0  
Pension Plan | Private Equity Limited Partnerships [Member] | International Multi-Strategy [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset [4]   0.0  
Pension Plan | Private Equity Limited Partnerships [Member] | International Multi-Strategy [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset [4]   4.6  
Pension Plan | Private Equity Limited Partnerships [Member] | Distressed Opportunities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   1.0  
Pension Plan | Private Equity Limited Partnerships [Member] | Distressed Opportunities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   0.0  
Pension Plan | Private Equity Limited Partnerships [Member] | Distressed Opportunities [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   0.0  
Pension Plan | Private Equity Limited Partnerships [Member] | Distressed Opportunities [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   1.0  
Pension Plan | Real Estate [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   2.3  
Pension Plan | Real Estate [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   0.0  
Pension Plan | Real Estate [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   0.0  
Pension Plan | Real Estate [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset   2.3  
Other Postretirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 213.9 211.6  
Other Postretirement Benefits | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 194.1 197.3  
Other Postretirement Benefits | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 19.8 14.3  
Other Postretirement Benefits | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Other Postretirement Benefits | International Equities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 40.1 38.9  
Other Postretirement Benefits | Fixed Income [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 71.8 72.2  
Other Postretirement Benefits | Commingled Funds [Member] | U.S. Equities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 13.0 13.6  
Other Postretirement Benefits | Commingled Funds [Member] | U.S. Equities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Other Postretirement Benefits | Commingled Funds [Member] | U.S. Equities [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 13.0 13.6  
Other Postretirement Benefits | Commingled Funds [Member] | U.S. Equities [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Other Postretirement Benefits | Commingled Funds [Member] | Short-Term Money Markets [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 6.8 0.7  
Other Postretirement Benefits | Commingled Funds [Member] | Short-Term Money Markets [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Other Postretirement Benefits | Commingled Funds [Member] | Short-Term Money Markets [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 6.8 0.7  
Other Postretirement Benefits | Commingled Funds [Member] | Short-Term Money Markets [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Other Postretirement Benefits | Mutual Funds [Member] | U.S. Equities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 82.3 86.4  
Other Postretirement Benefits | Mutual Funds [Member] | U.S. Equities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 82.3 86.4  
Other Postretirement Benefits | Mutual Funds [Member] | U.S. Equities [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Other Postretirement Benefits | Mutual Funds [Member] | U.S. Equities [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Other Postretirement Benefits | Mutual Funds [Member] | International Equities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 40.1 38.9  
Other Postretirement Benefits | Mutual Funds [Member] | International Equities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 40.1 38.9  
Other Postretirement Benefits | Mutual Funds [Member] | International Equities [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Other Postretirement Benefits | Mutual Funds [Member] | International Equities [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Other Postretirement Benefits | Mutual Funds [Member] | Fixed Income [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 71.7 72.0  
Other Postretirement Benefits | Mutual Funds [Member] | Fixed Income [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 71.7 72.0  
Other Postretirement Benefits | Mutual Funds [Member] | Fixed Income [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset 0.0 0.0  
Other Postretirement Benefits | Mutual Funds [Member] | Fixed Income [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of asset $ 0.0 $ 0.0  
[1] This class represents pending trades with brokers.
[2] This class represents pending trades with brokers.
[3] This class includes limited partnerships/fund of funds that invest in a diverse portfolio of private equity strategies, including buy-outs, venture capital, growth capital, special situations and secondary markets, primarily in the United States.
[4] This class includes limited partnerships/fund of funds that invest in a diverse portfolio of private equity strategies, including buy-outs, venture capital, growth capital, special situations and secondary markets, primarily outside the United States.