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Other income net - Summary of Other Income (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Revenue [abstract]      
Interest income on financial assets carried at amortized cost $ 128 $ 107 $ 135
Interest income on financial assets fair valued through other comprehensive income 122 119 86
Gain / (loss) on investments carried at fair value through profit or loss 34 18 24
Interest income on income tax refund [1] 237    
Exchange gains / (losses) on forward and options contracts 12 (80) 12
Exchange gains / (losses) on translation of other assets and liabilities 11 131 24
Others 24 40 27
Other income $ 568 $ 335 $ 308
[1] During the year ending March 31, 2024, the Company received orders under section 250 and 254 of the Income Tax Act, 1961, from the Income Tax Authorities in India for the assessment years, 2007-08 to 2015-16, 2017-18 and

2018-19. These orders confirmed the Company's position with respect to tax treatment of certain contentious matters. As a result, interest income (pre-tax) of $232 million along with the corresponding tax impact was recognized.