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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

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