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Pension and Postretirement Benefits (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |
Projected benefit obligation | $ 1,152.1 | $ 1,259.8 |
Percentage of non-matching contribution to participants | 3.00% |  |
Common Stock |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 4.00% | 4.00% |
Savings And Investment Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | $ 12.0 | $ 11.8 | $ 11.0
2% Non-Matching Contribution |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | $ 14.6 | $ 14.5 | 13.4
Actively Managed U.S. Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 44.00% | 44.00% |
Fixed income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 31.00% | 26.00% |
Alternative assets/Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 22.00% | 27.00% |
Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected future employer cash contributions | $ 18.9 |  |
Projected benefit obligation | 1,152.1 | $ 1,259.8 | 1,168.7
Employer contributions | 26.7 | 26.1 |
Supplemental Employee Retirement Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pre-tax settlement gain |  |  | 0.1
Projected benefit obligation | 3.7 | 3.9 |
Employer contributions | $ 0.2 | $ 0.2 | $ 2.2
United States |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined benefit pension plan employees, percentage | 16.00% |  |
Percentage of combined expected actuarial losses | 1.00% | 1.00% |
United States | Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected rate of return on plan assets | 6.50% | 7.25% | 7.25%
United States | Pension Plan | Actively Managed U.S. Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 64.40% |  |
United States | Pension Plan | Fixed income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 22.30% |  |
United States | Pension Plan | Alternative assets/Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 12.60% |  |
United States | Pension Plan | Cash |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 0.70% |  |
United States | Pension Plan | Minimum | Actively Managed U.S. Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected rate of return on plan assets | 25.00% |  |
United States | Pension Plan | Minimum | Fixed income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected rate of return on plan assets | 15.00% |  |
United States | Pension Plan | Minimum | Alternative assets/Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected rate of return on plan assets | 10.00% |  |
United States | Pension Plan | Minimum | Cash |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 0.00% |  |
United States | Pension Plan | Maximum | Actively Managed U.S. Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected rate of return on plan assets | 75.00% |  |
United States | Pension Plan | Maximum | Fixed income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected rate of return on plan assets | 35.00% |  |
United States | Pension Plan | Maximum | Alternative assets/Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected rate of return on plan assets | 35.00% |  |
United States | Pension Plan | Maximum | Cash |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 10.00% |  |
Foreign Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined benefit pension plan employees, percentage | 9.00% |  |
Percentage of combined expected actuarial gains | 2.00% | 5.00% |
Foreign Plan | Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected rate of return on plan assets | 4.45% | 5.31% | 5.34%
Foreign Plan | Pension Plan | Actively Managed U.S. Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 24.90% |  |
Foreign Plan | Pension Plan | Fixed income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 39.80% |  |
Foreign Plan | Pension Plan | Alternative assets/Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 30.50% |  |
Foreign Plan | Pension Plan | Cash |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actual Allocation | 4.80% |  |

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