Financial Instruments - Summary of Credit Receivable (Details) - USD ($) $ in Millions	Mar. 31, 2026	Mar. 31, 2025
Disclosure of detailed information about financial instruments [abstract]
Trade receivables	$ 3,715	$ 3,645
Unbilled revenues	$ 1,816	$ 1,764

The amount of current trade receivables. [Refer: Trade receivables]

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Data Type:	xbrli:monetaryItemType
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