v3.25.2
Investments - Schedule of Carrying Value of Investments (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Mar. 31, 2024
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Carrying value of investments, Current $ 1,460 $ 1,548
Carrying value of investments, Non-Current 1,294 1,404
Total Investments 2,754 2,952
Amortized Cost    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Total Investments 193 211
Fair Value Through Profit or Loss    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Total Investments 309 388
Fair Value Through Other Comprehensive Income    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Total Investments 2,252 2,353
Cost | Quoted Debt Securities | Amortized Cost    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Carrying value of investments, Current 20  
Carrying value of investments, Non-Current 173 211
Fair Value    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Total Investments 2,774 2,977
Fair Value | Quoted Debt Securities | Amortized Cost    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Total Investments 213 236
Fair Value | Quoted Debt Securities | Fair Value Through Other Comprehensive Income    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Carrying value of investments, Current 375 291
Carrying value of investments, Non-Current 1,014 1,093
Total Investments 1,389 1,384
Fair Value | Liquid Mutual Funds | Fair Value Through Profit or Loss    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Carrying value of investments, Current 229 313
Total Investments 229 313
Fair Value | Commercial Paper | Fair Value Through Other Comprehensive Income    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Carrying value of investments, Current 426 579
Total Investments 426 579
Fair Value | Certificates of Deposit | Fair Value Through Other Comprehensive Income    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Carrying value of investments, Current 410 365
Total Investments 410 365
Fair Value | Quoted Equity Secutities | Fair Value Through Other Comprehensive Income    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Carrying value of investments, Non-Current 7 14
Total Investments 7 14
Fair Value | Unquoted Equity and Preference Securities | Fair Value Through Profit or Loss    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Carrying value of investments, Non-Current 3  
Total Investments 3  
Fair Value | Unquoted Equity and Preference Securities | Fair Value Through Other Comprehensive Income    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Carrying value of investments, Non-Current 20 11
Total Investments 20 11
Fair Value | Target Maturity Fund Units | Fair Value Through Profit or Loss    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Carrying value of investments, Non-Current 54 51
Total Investments 54 51
Fair Value | Others | Fair Value Through Profit or Loss    
Disclosure Of Investments Other Than Investments Accounted For Using Equity Method [Line Items]    
Carrying value of investments, Non-Current 23 24
Total Investments $ 23 $ 24