Pension And Postretirement Benefits (Schedule Of Fair Value Of Company Pension Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,081.4	$ 1,024.1
Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	545.3	398.7
Other Observable Inputs Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14.7	14.3
Unobservable Inputs Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21.7	22.8
Net Asset Value ("NAV") Practical Expedient (a)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	499.7	588.3
Cash Equivalents and Money Markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	30.5	30.1
Cash Equivalents and Money Markets | Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	30.5	30.1
Actively Managed U.S. Equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	112.8	103.2
Actively Managed U.S. Equities | Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	112.8	103.2
Fixed Income Bonds and Notes
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0.1
Fixed Income Bonds and Notes | Other Observable Inputs Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0.1
U.S. Equity Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	129.1	117.3
U.S. Equity Funds | Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	129.1	117.3
Non-U.S. Equity Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	233.0	231.2
Non-U.S. Equity Funds | Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	93.7	53.2
Non-U.S. Equity Funds | Net Asset Value ("NAV") Practical Expedient (a)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	139.3	178.0
U.S. Fixed Income, Government and Corporate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	116.2	76.6
U.S. Fixed Income, Government and Corporate | Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	116.2	76.6
Registered Investment Company
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	34.0	18.3
Registered Investment Company | Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	34.0	18.3
Collective Trust
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	40.7	42.0
Collective Trust | Unobservable Inputs Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21.7	22.8
Collective Trust | Net Asset Value ("NAV") Practical Expedient (a)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	19.0	19.2
Non-U.S. Fixed Income, Government and Corporate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	222.6	186.5
Non-U.S. Fixed Income, Government and Corporate | Net Asset Value ("NAV") Practical Expedient (a)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	222.6	186.5
International Balanced Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2.1	1.9
International Balanced Funds | Net Asset Value ("NAV") Practical Expedient (a)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2.1	1.9
Property Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29.0
Property Funds | Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29.0
Insurance / Annuity Contract(s)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14.7	14.2
Insurance / Annuity Contract(s) | Other Observable Inputs Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14.7	14.2
Hedge Funds and LDI
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	64.0	153.8
Hedge Funds and LDI | Net Asset Value ("NAV") Practical Expedient (a)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	64.0	153.8
International Property Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	52.7	48.9
International Property Funds | Net Asset Value ("NAV") Practical Expedient (a)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 52.7	$ 48.9