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Revenue - Summary of Contract Balances (Details) - USD ($) $ in Millions	Mar. 31, 2025	Mar. 31, 2024
Current assets:
Accounts receivable–billed	$ 781	$ 700
Allowance for credit losses	(1)	0
Accounts receivable, net	2,271	2,047
Accounts receivable–unbilled (contract assets)	58	57
Total accounts receivable, net	2,329	2,104
Other current liabilities
Advance payments, billings in excess of costs incurred and deferred revenue (contract liabilities)	18	16
Accounts receivable–unbilled (contract assets)	$ 1,491	$ 1,347

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