Leases - Schedule of Contractual Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2026	Mar. 31, 2025
Disclosure Of Contractual Maturities Of Lease Liabilities [Line Items]
Total	$ 1,078	$ 1,050
Less Than 1 Year
Disclosure Of Contractual Maturities Of Lease Liabilities [Line Items]
Total	358	290
One to five years
Disclosure Of Contractual Maturities Of Lease Liabilities [Line Items]
Total	610	608
More than five years
Disclosure Of Contractual Maturities Of Lease Liabilities [Line Items]
Total	$ 110	$ 152

The amount of contractual undiscounted cash flows in relation to lease liabilities before deducting finance charges. [Refer: Lease liabilities]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2025-01-01
-Paragraph 58
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-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2025-01-01
-Paragraph B11D
-Subparagraph a
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-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 119
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_119&doctype=Standard
-URIDate 2025-03-27

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 119
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_119&doctype=Standard
-URIDate 2025-03-27

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant