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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-based Payment Arrangement Activity During 2023, the following units were granted based upon the establishment of performance targets:
Performance-based Award Units Granted in 2023Weighted Average
Grant Date
Fair Value
Per Share
2023 Performance Award Plan91,585$39.00
2022 Performance Award Plan142,319$35.87
2021 Performance Award Plan204,622$46.84
Schedule of Disclosure of Compensation Arrangements by Share-based Payment Award
Location in Statement of Operations3ME
June 30,		6ME
June 30,
(in millions)2023202220232022
SGI awardsG&A$4 $1 $11 $11 
Performance-based awards for other executivesG&A10 (3)17 12 
Liabilities (in millions)Location on Balance SheetJune 30,
2023		December 31, 2022
SGI awardsAccrued salaries, wages and benefits and other noncurrent liabilities$52 $92 
Performance-based awards for other executivesAccrued salaries, wages and benefits and other noncurrent liabilities26 15