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Retirement Plans (Schedule of Funded Status and Components of the Amounts Recognized in the Consolidated Balance Sheets and in Accumulated Other Comprehensive Gain (Loss), Before the Effect of Income Taxes) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Components of Net Periodic Pension Cost      
Service cost $ (39) $ (32) $ (56)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement Of Income Or Comprehensive Income, Extensible List, Not Disclosed Flag Interest cost Interest cost Interest cost
Interest cost $ (21) $ (23) $ (10)
Expected return on plan assets 19 18 15
Amortization of prior service cost and transition amount 1 1 1
Recognized actuarial loss (1) 4 (9)
Net periodic benefit cost (41) (32) (59)
Net actuarial gain (loss) 43 (67) 244
Recognized net actuarial loss 1 (4) 9
Prior service cost and transition amount (1) (1) (1)
Total recognized in OCI 43 (72) 252
Total recognized in net periodic benefit cost and OCI $ 2 $ (104) $ 193
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]      
Discount rate 2.80% 3.30% 1.10%
Expected return on plan assets 4.30% 4.20% 3.10%
Expected return on plan assets 3.00% 3.00% 2.60%
Weighted-average discount rate used to determine projected benefit obligations 2.90% 2.80% 3.30%
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of plan assets $ 492 $ 485  
Benefit obligations (782) (826) $ (673)
Funded status (290) (341)  
Total 14 (28)  
Accrued Compensation      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Funded status (3) (3)  
Other noncurrent assets      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Funded status 48 21  
Other noncurrent liabilities      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Funded status (335) (359)  
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Unrecognized net actuarial gain (loss) 6 (39)  
Unrecognized prior service credit $ 8 $ 11