Pension And Postretirement Benefits (Schedule Of Fair Value Of Company Pension Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 713.8	$ 1,081.4
Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	420.1	545.3
Other Observable Inputs Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13.4	14.7
Unobservable Inputs Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16.5	21.7
Net Asset Value ("NAV") Practical Expedient (a)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	263.8	499.7
Cash Equivalents and Money Markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27.8	30.5
Cash Equivalents and Money Markets | Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27.8	30.5
Actively Managed U.S. Equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	31.8	112.8
Actively Managed U.S. Equities | Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	31.8	112.8
U.S. Equity Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	152.3	129.1
U.S. Equity Funds | Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	152.3	129.1
Non-U.S. Equity Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	122.1	233.0
Non-U.S. Equity Funds | Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	74.3	93.7
Non-U.S. Equity Funds | Net Asset Value ("NAV") Practical Expedient (a)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	47.8	139.3
U.S. Fixed Income, Government and Corporate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	88.9	116.2
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	88.9	116.2
Registered Investment Company
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23.3	34.0
Registered Investment Company | Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23.3	34.0
Collective Trust
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	35.3	40.7
Collective Trust | Unobservable Inputs Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16.5	21.7
Collective Trust | Net Asset Value ("NAV") Practical Expedient (a)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18.8	19.0
Non-U.S. Fixed Income, Government and Corporate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	103.5	222.6
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	103.5	222.6
International Balanced Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1.8	2.1
International Balanced Funds | Net Asset Value ("NAV") Practical Expedient (a)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1.8	2.1
Property Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21.7	29.0
Property Funds | Active Markets for Identical Assets Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21.7	29.0
Insurance / Annuity Contract(s)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13.4	14.7
Insurance / Annuity Contract(s) | Other Observable Inputs Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13.4	14.7
Hedge Funds and LDI
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	60.1	64.0
Hedge Funds and LDI | Net Asset Value ("NAV") Practical Expedient (a)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	60.1	64.0
International Property Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	31.8	52.7
International Property Funds | Net Asset Value ("NAV") Practical Expedient (a)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 31.8	$ 52.7