Pension and Other Postretirement Benefits (Schedule Of Pension Plan And Postretirement Plan Asset Mix) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 1,596.4	$ 1,579.9
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Percentage of total asset	100.00%	100.00%
Noncurrent assets	$ 82.8	$ 66.5
Pension Plan \| Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,336.1	1,336.5	$ 1,426.8
Noncurrent assets	$ 1,338.4	$ 1,336.4
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Percentage of total asset	100.00%	100.00%
Noncurrent assets	$ 0.5	$ 0.0
Other Postretirement Benefits \| Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	257.6	243.2	$ 236.5
Noncurrent assets	258.0	243.5
Domestic Equities \| Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 270.0	$ 258.9
Percentage of total asset	20.20%	19.40%
Domestic Equities \| Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 105.4	$ 99.6
Percentage of total asset	40.80%	40.90%
International Equities \| Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 137.5	$ 122.5
Percentage of total asset	10.30%	9.20%
International Equities \| Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 48.8	$ 40.7
Percentage of total asset	18.90%	16.70%
Fixed Income \| Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 869.0	$ 891.2
Percentage of total asset	64.90%	66.70%
Fixed Income \| Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 99.2	$ 96.5
Percentage of total asset	38.50%	39.60%
Real Estate \| Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 4.0
Percentage of total asset		0.30%
Real Estate \| Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0.0
Percentage of total asset		0.00%
Cash/Other [Member] \| Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 61.9	$ 59.8
Percentage of total asset	4.60%	4.40%
Cash/Other [Member] \| Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 4.6	$ 6.7
Percentage of total asset	1.80%	2.80%
Commingled Funds \| Short-Term Money Markets \| Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 50.1	$ 45.9
Commingled Funds \| Short-Term Money Markets \| Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	4.6	6.7
Commingled Funds \| International Equities \| Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	103.6	65.3
Commingled Funds \| International Equities \| Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	32.1	24.2
Commingled Funds \| Fixed Income \| Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	196.5	214.1
Commingled Funds \| United States Equities \| Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	216.1	202.8
Commingled Funds \| United States Equities \| Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 13.0	$ 12.2