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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