Pension and Postretirement Benefit Plans (Fair Value of Pension Assets) (Details) - Pension plan - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	$ 494.0	$ 572.0	$ 528.7
Government treasuries
Defined Benefit Plan, Plan Assets, Category [Line Items]
Investment within plan asset category, percentage	68.00%	67.00%
Foreign
Defined Benefit Plan, Plan Assets, Category [Line Items]
Investment within plan asset category, percentage	22.00%	27.00%
Investment grade corporate bonds
Defined Benefit Plan, Plan Assets, Category [Line Items]
Investment within plan asset category, percentage	2.00%	4.00%
Asset or Mortgage Backed Securities
Defined Benefit Plan, Plan Assets, Category [Line Items]
Investment within plan asset category, percentage	7.00%
High-yield
Defined Benefit Plan, Plan Assets, Category [Line Items]
Investment within plan asset category, percentage	1.00%	2.00%
Relative value funds
Defined Benefit Plan, Plan Assets, Category [Line Items]
Investment within plan asset category, percentage	49.00%	53.00%
Long-short equity funds
Defined Benefit Plan, Plan Assets, Category [Line Items]
Investment within plan asset category, percentage	30.00%	24.00%
Event-driven funds
Defined Benefit Plan, Plan Assets, Category [Line Items]
Investment within plan asset category, percentage	14.00%	8.00%
Credit funds
Defined Benefit Plan, Plan Assets, Category [Line Items]
Investment within plan asset category, percentage	7.00%	9.00%
Hedged and non-hedged funds
Defined Benefit Plan, Plan Assets, Category [Line Items]
Investment within plan asset category, percentage		6.00%
Total of Level 1, Level 2, and Level 3 | Total equity securities
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	$ 21.3	$ 55.8
Total of Level 1, Level 2, and Level 3 | Global equities
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	21.3	55.8
Total of Level 1, Level 2, and Level 3 | Total fixed income share
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	420.5	437.1
Total of Level 1, Level 2, and Level 3 | Aggregate fixed income
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	420.5	437.1
Total of Level 1, Level 2, and Level 3 | Total alternative investments
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	10.0	35.4
Total of Level 1, Level 2, and Level 3 | Private equity fund
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	2.2
Total of Level 1, Level 2, and Level 3 | Miscellaneous funds
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	32.2	38.8
Level 1
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	420.5	437.1
Level 1 | Total equity securities
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	0.0
Level 1 | Global equities
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	0.0
Level 1 | Total fixed income share
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	420.5	437.1
Level 1 | Aggregate fixed income
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	420.5	437.1
Level 1 | Total alternative investments
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	0.0
Level 1 | Private equity fund
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets		0.0
Level 1 | Miscellaneous funds
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	0.0
Level 2
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	21.3	55.8
Level 2 | Total equity securities
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	21.3	55.8
Level 2 | Global equities
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	21.3	55.8
Level 2 | Total fixed income share
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	0.0
Level 2 | Aggregate fixed income
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	0.0
Level 2 | Total alternative investments
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	0.0
Level 2 | Private equity fund
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	0.0
Level 2 | Miscellaneous funds
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	0.0
Level 3
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	32.2	41.0	40.2
Level 3 | Total equity securities
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	0.0
Level 3 | Global equities
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	0.0
Level 3 | Total fixed income share
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	0.0
Level 3 | Aggregate fixed income
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	0.0
Level 3 | Total alternative investments
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	2.2	2.4
Level 3 | Private equity fund
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	0.0	2.2
Level 3 | Miscellaneous funds
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	32.2	38.8	$ 37.8
Measured at net asset value per share | Hedge funds
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	10.0	33.2
Measured at net asset value per share | Cash and cash equivalents
Defined Benefit Plan, Plan Assets, Category [Line Items]
Total assets	$ 10.0	$ 4.9