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Retirement Plans (Schedule of Valuation of the Company's Pension Plan Assets by Pricing Categories) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | $ 485 | $ 420
(Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 42 | 46
(Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 378 | 319
(Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 65 | 55
Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 15 | 18
Cash and cash equivalents | (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 15 | 18
Cash and cash equivalents | (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Cash and cash equivalents | (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 150 | 120
Equity securities | (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 20 | 21
Equity securities | (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 130 | 99
Equity securities | (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Corporate debt securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 187 | 153
Corporate debt securities | (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 2 | 2
Corporate debt securities | (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 185 | 151
Corporate debt securities | (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 133 | 129
Other | (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 5 | 5
Other | (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 63 | 69
Other | (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | $ 65 | $ 55

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