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Financial Instruments - Fair Value Of Short-Term Investments By Stated Maturity Date Schedule (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Mar. 31, 2023
Financial Instruments [Abstract]    
Due in 1 year or less, Amortized Cost $ 231 $ 267
Due in 1 year or less, Fair Value 231 266
Due 1 year through 5 years, Amortized Cost 126 72
Due 1 year through 5 years, Fair Value 126 72
Due after 5 years, Amortized Cost 5 5
Due after 5 years, Fair Value 5 5
Short-term investments, Amortized Cost 362 344
Short-term investments, Fair Value $ 362 $ 343