Pensions and Postretirement Benefits Other Than Pensions (Schedule of Fair Values of Company's Pension Plan Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 |
Defined benefit plan, fair value of pension plan assets | $ 2,051.6 | $ 2,993.8 |
Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 3.3 | 1.6 |
Fair Value, Inputs, Level 2 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 1,450.9 | 2,118.7 |
Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 109.8 | 140.2 |
Net Assets, Segment [Member] | | |
Defined benefit plan, fair value of pension plan assets | 479.2 | 739.1 |
Registered mutual funds, fixed income specialty [Member] | | |
Defined benefit plan, fair value of pension plan assets | 105 | 191.4 |
Registered mutual funds, fixed income specialty [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 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 |
Registered mutual funds, fixed income specialty [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
U.S. Government and Agency Obligations [Member] | | |
Defined benefit plan, fair value of pension plan assets | 323.6 | 551.4 |
U.S. Government and Agency Obligations [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
U.S. Government and Agency Obligations [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 323.6 | 551.4 |
U.S. Government and Agency Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Corporate and Non-U.S. Bonds [Member] | | |
Defined benefit plan, fair value of pension plan assets | 1,065.7 | 1,453.6 |
Corporate and Non-U.S. Bonds [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Corporate and Non-U.S. Bonds [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 1,065.7 | 1,453.6 |
Corporate and Non-U.S. Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Asset-Backed And Mortgage-Backed Securities [Member] | | |
Defined benefit plan, fair value of pension plan assets | 12.5 | 63.7 |
Asset-Backed And Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Asset-Backed And Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 12.5 | 63.7 |
Asset-Backed And Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Commingled Funds - Fixed Income Specialty [Member] | | |
Defined benefit plan, fair value of pension plan assets | 61.7 | 77.7 |
Commingled Funds - Fixed Income Specialty [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 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 |
Commingled Funds - Fixed Income Specialty [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Other Fixed Income [Member] | | |
Defined benefit plan, fair value of pension plan assets | 29.3 | 32 |
Other Fixed Income [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Other Fixed Income [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Other Fixed Income [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 29.3 | 32 |
Derivative [Member] | | |
Defined benefit plan, fair value of pension plan assets | (1.5) | (0.5) |
Derivative [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Derivative [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Defined benefit plan, fair value of pension plan assets | (1.5) | (0.5) |
Derivative [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Derivative [Member] | Net Assets, Segment [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Real Estate Funds [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0.9 | 2.1 |
Real Estate Funds [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Real Estate Funds [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Real Estate Funds [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0.9 | 2.1 |
Real Estate Funds [Member] | Net Assets, Segment [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Other Defined Benefit [Member] | | |
Defined benefit plan, fair value of pension plan assets | 79.6 | 106.1 |
Other Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Other Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Other Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 79.6 | 106.1 |
Other Defined Benefit [Member] | Net Assets, Segment [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Cash and Cash Equivalents [Member] | | |
Defined benefit plan, fair value of pension plan assets | 53.9 | 52.1 |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 3.3 | 1.6 |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 50.6 | 50.5 |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Registered mutual funds, equity specialty [Member] | | |
Defined benefit plan, fair value of pension plan assets | 68 | 107.5 |
Registered mutual funds, equity specialty [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 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 |
Registered mutual funds, equity specialty [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Commingled funds, equity specialty [Member] | | |
Defined benefit plan, fair value of pension plan assets | 244.5 | 362.5 |
Commingled funds, equity specialty [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Commingled funds, equity specialty [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Commingled funds, equity specialty [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Receivables and Payables | | |
Defined benefit plan, fair value of pension plan assets | 8.4 | (5.8) |
Cash and Cash Equivalents [Member] | Net Assets, Segment [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Registered mutual funds, equity specialty [Member] | Net Assets, Segment [Member] | | |
Defined benefit plan, fair value of pension plan assets | 68 | 107.5 |
Equity Securities [Member] | | |
Defined benefit plan, fair value of pension plan assets | 312.5 | 470 |
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Equity Securities [Member] | Net Assets, Segment [Member] | | |
Defined benefit plan, fair value of pension plan assets | 312.5 | 470 |
Commingled funds, equity specialty [Member] | Net Assets, Segment [Member] | | |
Defined benefit plan, fair value of pension plan assets | 244.5 | 362.5 |
Fixed Income Investments [Member] | Fair Value, Inputs, Level 1 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Fixed Income Investments [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 1,401.8 | 2,068.7 |
Fixed Income Investments [Member] | Fair Value, Inputs, Level 3 [Member] | | |
Defined benefit plan, fair value of pension plan assets | 29.3 | 32 |
Fixed Income Investments [Member] | Registered mutual funds, fixed income specialty [Member] | Net Assets, Segment [Member] | | |
Defined benefit plan, fair value of pension plan assets | 105 | 191.4 |
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 |
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 |
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 |
Fixed Income Investments [Member] | Commingled Funds - Fixed Income Specialty [Member] | Net Assets, Segment [Member] | | |
Defined benefit plan, fair value of pension plan assets | 61.7 | 77.7 |
Fixed Income Investments [Member] | Other Fixed Income [Member] | Net Assets, Segment [Member] | | |
Defined benefit plan, fair value of pension plan assets | 0 | 0 |
Fixed Income Investments [Member] | Total Plan Assets Excluding Nav Assets Member | | |
Defined benefit plan, fair value of pension plan assets | 1,597.8 | 2,369.8 |
Fixed Income Investments [Member] | Total Plan Assets Excluding Nav Assets Member | Net Assets, Segment [Member] | | |
Defined benefit plan, fair value of pension plan assets | 166.7 | 269.1 |
Defined Benefit Plan Fair Value of Plan Assets Measured Using Net Asset Value [Member] | | |
Defined benefit plan, fair value of pension plan assets | $ 2,043.2 | $ 2,999.6 |