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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, 2022
Dec. 31, 2021
Dec. 31, 2020
Components of Net Periodic Pension Cost      
Service cost $ (56) $ (72) $ (63)
Interest cost (10) (7) (8)
Expected return on plan assets 15 11 13
Amortization of prior service cost and transition amount 1 1 1
Recognized actuarial loss (9) (16) (13)
Curtailment gain   9  
Net periodic benefit cost (59) (74) (70)
Net actuarial gain (loss) 244 132 (117)
Recognized net actuarial loss 9 16 13
Prior service cost and transition amount (1) (1) (1)
Curtailment gain   (9) 0
Total recognized in OCI 252 138 (105)
Total recognized in net periodic benefit cost and OCI $ 193 $ 64 $ (175)
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]      
Discount rate 1.10% 0.80% 1.00%
Expected return on plan assets 3.10% 2.50% 2.90%
Expected return on plan assets 2.60% 2.60% 2.90%
Weighted-average discount rate used to determine projected benefit obligations 3.30% 1.10% 0.80%
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of plan assets $ 420 $ 543  
Benefit obligations (673) (1,036) $ (1,118)
Funded status (253) (493)  
Total 44 (208)  
Accrued Compensation      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Funded status (3) (2)  
Other noncurrent assets      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Funded status 21 0  
Other noncurrent liabilities      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Funded status (271) (491)  
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Unrecognized net actuarial gain (loss) 33 (215)  
Unrecognized prior service credit $ 11 $ 7