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Fair Value Of Financial Instruments (Pension Plan Assets Measured At Fair Value On Recurring Basis) (Details) - Pension [Member] - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | $ 2,280 | $ 2,150
Interest in Registered Investment Companies |  | 54
Limited Liability Companies | 65 | 81
Interest and Dividend Receivable | 2 | 5
Due from Broker for Securities Sold | 14 | 11
Value of Funds Held in Insurance Co. | 4 | 5
Due to Broker for Securities Purchased | (37) | (38)
Total Plan Assets, at Fair Value | 2,328 | 2,268
Cash and Cash Equivalents [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | 127 | 128
U.S. Government Obligations [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | 394 | 300
Corporate and Other Obligations [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value |  | 160
Common Stock [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | 2 | 90
Interest in Limited Partnerships and Limited Liability Corporations [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | 161 | 162
Comingled Funds [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | 1,596 | 1,310
Fair Value, Inputs, Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | 129 | 218
Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | 127 | 128
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | 2 | 90
Fair Value, Inputs, Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | 1,990 | 1,770
Fair Value, Inputs, Level 2 [Member] | U.S. Government Obligations [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | 394 | 300
Fair Value, Inputs, Level 2 [Member] | Corporate and Other Obligations [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value |  | 160
Fair Value, Inputs, Level 2 [Member] | Comingled Funds [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | 1,596 | 1,310
Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | 161 | 162
Fair Value, Inputs, Level 3 [Member] | Interest in Limited Partnerships and Limited Liability Corporations [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total investments at fair value | $ 161 | $ 162

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