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Receivables - Receivables, Net of Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Mar. 31, 2024
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | $ 2,972 | $ 3,253
Billed trade receivables |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 1,331 | 1,433
Unbilled receivables |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 1,048 | 1,124
Other receivables |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | $ 593 | $ 696

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