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Financial Instruments - Summary of Contractual Maturities of Significant Financial Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Mar. 31, 2023
Disclosure Of Financial Instruments [Line Items]    
Trade payables $ 474 $ 470
Financial liability under option arrangements on an undiscounted basis (Refer to Note 2.5) 83 82
Other financial liabilities on an undiscounted basis (Refer to Note 2.5) 1,891  
Other financial liabilities (excluding liabilities towards contingent consideration) on an undiscounted basis (Refer to Note 2.5)   2,116
Liability towards contingent consideration on an undiscounted basis (Refer to Note 2.5)   12
Less Than 1 Year    
Disclosure Of Financial Instruments [Line Items]    
Trade payables 474 470
Financial liability under option arrangements on an undiscounted basis (Refer to Note 2.5) 67 82
Other financial liabilities on an undiscounted basis (Refer to Note 2.5) 1,657  
Other financial liabilities (excluding liabilities towards contingent consideration) on an undiscounted basis (Refer to Note 2.5)   1,875
Liability towards contingent consideration on an undiscounted basis (Refer to Note 2.5)   12
1-2 Years    
Disclosure Of Financial Instruments [Line Items]    
Other financial liabilities on an undiscounted basis (Refer to Note 2.5) 158  
Other financial liabilities (excluding liabilities towards contingent consideration) on an undiscounted basis (Refer to Note 2.5)   186
2-4 Years    
Disclosure Of Financial Instruments [Line Items]    
Other financial liabilities on an undiscounted basis (Refer to Note 2.5) 68  
Other financial liabilities (excluding liabilities towards contingent consideration) on an undiscounted basis (Refer to Note 2.5)   53
4-7 Years    
Disclosure Of Financial Instruments [Line Items]    
Financial liability under option arrangements on an undiscounted basis (Refer to Note 2.5) 16  
Other financial liabilities on an undiscounted basis (Refer to Note 2.5) $ 8  
Other financial liabilities (excluding liabilities towards contingent consideration) on an undiscounted basis (Refer to Note 2.5)   $ 2