Financial Instruments - Summary of Credit Receivable (Details) - USD ($) $ in Millions	Mar. 31, 2025	Mar. 31, 2024
Disclosure of detailed information about financial instruments [abstract]
Trade receivables	$ 3,645	$ 3,620
Unbilled revenues	$ 1,764	$ 1,744

The amount of assets representing income that has been earned but is not yet a receivable, including contract assets. [Refer: Contract assets]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant