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Financial Instruments - Fair Value Of Short-Term Investments By Stated Maturity Date Schedule (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Mar. 31, 2024
Financial Instruments [Abstract]    
Due in 1 year or less, Amortized Cost $ 250 $ 231
Due in 1 year or less, Fair Value 250 231
Due 1 year through 5 years, Amortized Cost 111 126
Due 1 year through 5 years, Fair Value 111 126
Due after 5 years, Amortized Cost 5 5
Due after 5 years, Fair Value 5 5
Amortized Cost 366 362
Fair Value $ 366 $ 362 [1]
[1] Derived from audited Consolidated Financial Statements.