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Fair Value Measurement (Tables)
3 Months Ended
Mar. 31, 2025
Fair Value Disclosures [Abstract]  
Schedule of financial assets measured at fair value on a recurring basis
The following table summarizes our financial assets and financial liabilities that are measured at fair value on a recurring basis:
(in millions)
ClassificationMeasurement LevelMarch 31, 2025December 31, 2024
Financial assets
Money market trustCash and cash equivalentsLevel 1$2,292 $1,755 
Money market fundCash and cash equivalentsLevel 1$771 $828 
Money market trustRestricted cashLevel 1$84 $83