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Pensions and Postretirement Benefits Other Than Pensions (Schedule of Fair Values of Company's Pension Plan Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Defined benefit plan, fair value of pension plan assets | $ 2,010.2 | $ 2,145.7
Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 6.5 | 4.7
Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 1,430.4 | 1,497.5
Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 117.7 | 120.9
Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 490.6 | 512.2
Registered mutual funds, fixed income specialty [Member] |  |
Defined benefit plan, fair value of pension plan assets | 91.7 | 96.1
Registered mutual funds, fixed income specialty [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Registered mutual funds, fixed income specialty [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Registered mutual funds, fixed income specialty [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
U.S. Government and Agency Obligations [Member] |  |
Defined benefit plan, fair value of pension plan assets | 384.1 | 355.7
U.S. Government and Agency Obligations [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
U.S. Government and Agency Obligations [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 384.1 | 355.7
U.S. Government and Agency Obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Corporate and Non-U.S. Bonds [Member] |  |
Defined benefit plan, fair value of pension plan assets | 1,001.9 | 1,079.5
Corporate and Non-U.S. Bonds [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Corporate and Non-U.S. Bonds [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 1,001.9 | 1,079.5
Corporate and Non-U.S. Bonds [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Asset-Backed And Mortgage-Backed Securities [Member] |  |
Defined benefit plan, fair value of pension plan assets | 14.9 | 12.5
Asset-Backed And Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Asset-Backed And Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 14.9 | 12.5
Asset-Backed And Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Commingled Funds - Fixed Income Specialty [Member] |  |
Defined benefit plan, fair value of pension plan assets | 81.0 | 75.0
Commingled Funds - Fixed Income Specialty [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Commingled Funds - Fixed Income Specialty [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Commingled Funds - Fixed Income Specialty [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Other Fixed Income [Member] |  |
Defined benefit plan, fair value of pension plan assets | 31.5 | 31.2
Other Fixed Income [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Other Fixed Income [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Other Fixed Income [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 31.5 | 31.2
Derivative [Member] |  |
Defined benefit plan, fair value of pension plan assets | (0.5) | 5.9
Derivative [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Derivative [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | (0.5) | 5.9
Derivative [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Derivative [Member] | Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Other Defined Benefit [Member] |  |
Defined benefit plan, fair value of pension plan assets | 86.2 | 89.7
Other Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Other Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Other Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 86.2 | 89.7
Other Defined Benefit [Member] | Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Cash and Cash Equivalents [Member] |  |
Defined benefit plan, fair value of pension plan assets | 36.5 | 48.6
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 6.5 | 4.7
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 30.0 | 43.9
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Cash and Cash Equivalents [Member] | Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Registered mutual funds, equity specialty [Member] |  |
Defined benefit plan, fair value of pension plan assets | 73.7 | 78.7
Registered mutual funds, equity specialty [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Registered mutual funds, equity specialty [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Registered mutual funds, equity specialty [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Commingled funds, equity specialty [Member] |  |
Defined benefit plan, fair value of pension plan assets | 244.2 | 262.4
Commingled funds, equity specialty [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Commingled funds, equity specialty [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Commingled funds, equity specialty [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Receivables and Payables |  |
Defined benefit plan, fair value of pension plan assets | (35.0) | 10.4
Registered mutual funds, equity specialty [Member] | Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 73.7 | 78.7
Equity Securities [Member] |  |
Defined benefit plan, fair value of pension plan assets | 317.9 | 341.1
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Equity Securities [Member] | Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 317.9 | 341.1
Commingled funds, equity specialty [Member] | Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 244.2 | 262.4
Fixed Income Investments [Member] |  |
Defined benefit plan, fair value of pension plan assets | 1,605.1 | 1,650.0
Fixed Income Investments [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Fixed Income Investments [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 1,400.9 | 1,447.7
Fixed Income Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Defined benefit plan, fair value of pension plan assets | 31.5 | 31.2
Fixed Income Investments [Member] | Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 172.7 | 171.1
Fixed Income Investments [Member] | Registered mutual funds, fixed income specialty [Member] | Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 91.7 | 96.1
Fixed Income Investments [Member] | U.S. Government and Agency Obligations [Member] | Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Fixed Income Investments [Member] | Corporate and Non-U.S. Bonds [Member] | Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Fixed Income Investments [Member] | Asset-Backed And Mortgage-Backed Securities [Member] | Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Fixed Income Investments [Member] | Commingled Funds - Fixed Income Specialty [Member] | Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 81.0 | 75.0
Fixed Income Investments [Member] | Other Fixed Income [Member] | Net Assets, Segment [Member] |  |
Defined benefit plan, fair value of pension plan assets | 0.0 | 0.0
Defined Benefit Plan Fair Value of Plan Assets Measured Using Net Asset Value [Member] |  |
Defined benefit plan, fair value of pension plan assets | $ 2,045.2 | $ 2,135.3

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