v3.26.1
Financial risk management (Details)
₨ in Millions, $ in Millions
Mar. 31, 2026
INR (₨)
Mar. 31, 2026
USD ($)
Mar. 31, 2025
INR (₨)
Assets:      
Cash and cash equivalents ₨ 15,368 $ 164 ₨ 14,654
Other investments 83,141   53,645
Trade and other receivables 101,219   90,420
Other assets [1] 7,267   3,952
Total 207,150   163,228
Liabilities:      
Trade and other payables 33,411 356 35,523
Short-term borrowings 59,135 $ 630 38,045
Long-term borrowings 18,206   8,721
Other liabilities and provisions 44,012   36,917
Total 161,662   120,492
Foreign Currency Risk from Non-derivative Financial Instruments [Member]      
Assets:      
Cash and cash equivalents 4,654   4,903
Other investments 849   314
Trade and other receivables 58,072   64,572
Other assets 861   851
Total 64,436   70,640
Liabilities:      
Trade and other payables 11,115   10,720
Short-term borrowings     10,936
Long-term borrowings 8,893   2,149
Other liabilities and provisions 12,800   9,412
Total 32,808   33,217
US Dollars [Member] | Non-derivative financial instruments [Member]      
Assets:      
Cash and cash equivalents 4,566   4,098
Other investments 849   210
Trade and other receivables 52,042   59,076
Other assets 854   797
Total 58,311   64,181
Liabilities:      
Trade and other payables 7,798   8,298
Short-term borrowings     10,898
Long-term borrowings 8,562   1,851
Other liabilities and provisions 11,775   8,640
Total 28,135   29,687
Euro [Member] | Non-derivative financial instruments [Member]      
Assets:      
Cash and cash equivalents 0   390
Other investments 0   104
Trade and other receivables 1,174   498
Other assets 2   17
Total 1,176   1,009
Liabilities:      
Trade and other payables 1,241   1,660
Short-term borrowings     0
Long-term borrowings 147   242
Other liabilities and provisions 322   149
Total 1,710   2,051
Russian roubles [Member] | Non-derivative financial instruments [Member]      
Assets:      
Cash and cash equivalents 88   143
Other investments 0   0
Trade and other receivables 2,680   2,865
Other assets 5   3
Total 2,773   3,011
Liabilities:      
Trade and other payables 564   528
Short-term borrowings     0
Long-term borrowings 3   18
Other liabilities and provisions 68   111
Total 635   657
Other Currency [Member] | Non-derivative financial instruments [Member]      
Assets:      
Cash and cash equivalents 0 [2]   272 [3]
Other investments 0 [2]   0 [3]
Trade and other receivables 2,176 [2]   2,133 [3]
Other assets 0 [2]   34 [3]
Total 2,176 [2]   2,439 [3]
Liabilities:      
Trade and other payables 1,512 [2]   234 [3]
Short-term borrowings [3]     38
Long-term borrowings 181 [2]   38 [3]
Other liabilities and provisions 635 [2]   512 [3]
Total ₨ 2,328 [2]   ₨ 822 [3]
[1] Other assets that are not financial assets (such as receivables from statutory authorities, government incentives receivable, prepaid expenses, advances paid and certain other receivables) of Rs.30,215 and Rs.27,162 as of March 31, 2026 and 2025, respectively, are not included.
[2] Others primarily consists of Swiss francs, U.K. pounds sterling, Chinese yuans (Renminbi) and Romanian leu.
[3] Others primarily consists of Romanian new leus, Chinese yuans (Renminbi), U.K. pounds sterling and Japanese yen.