Accounts Receivable - Allowance for Doubtful Accounts Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at Beginning of Period	$ 5	$ 6	$ 5
Additions Charged to Expense	2	0	1
Accounts Recovered/(Written-Off)	0	(1)	0
Balance at End of Period	$ 7	$ 5	$ 6