v3.26.1
Financial Risk Management (Details 4) - INR (₨)
₨ in Millions
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows ₨ 57,348 ₨ 53,888 ₨ 47,108
Bank overdrafts [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 326 487
6% Compulsorily Convertible Debentures [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 4,000 6,260 7,156
8.95% Non-Convertible Debentures [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 2,500 2,500  
6% Non-Cumulative Compulsorily Convertible Preference Shares [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     500
Lease liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 3,902 3,810 3,043
Other liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     1,612
Borrowing from banks [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 25,094 20,925 18,794
Supplier finance arrangements [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 4,011 4,106  
Borrowings from others [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 6,999 5,689 3,564
Other financial liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 3,387 2,220  
Trade payables [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 7,455 8,052  
Trade and other payables [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     11,952
Not later than one year [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 29,418 25,079 22,075
Not later than one year [Member] | Bank overdrafts [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 326 531
Not later than one year [Member] | 6% Compulsorily Convertible Debentures [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 240 600 528
Not later than one year [Member] | 8.95% Non-Convertible Debentures [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 224 224  
Not later than one year [Member] | 6% Non-Cumulative Compulsorily Convertible Preference Shares [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     30
Not later than one year [Member] | Lease liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 805 689 588
Not later than one year [Member] | Other liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     1,594
Not later than one year [Member] | Borrowing from banks [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 11,963 7,192 5,557
Not later than one year [Member] | Supplier finance arrangements [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 4,067 4,159  
Not later than one year [Member] | Borrowings from others [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 1,313 1,653 1,295
Not later than one year [Member] | Other financial liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 3,351 2,184  
Not later than one year [Member] | Trade payables [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 7,455 8,052  
Not later than one year [Member] | Trade and other payables [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     11,952
Later than one year and not later than three years [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 12,177 13,173 12,514
Later than one year and not later than three years [Member] | Bank overdrafts [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 0 0
Later than one year and not later than three years [Member] | 6% Compulsorily Convertible Debentures [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 480 1,200 1,584
Later than one year and not later than three years [Member] | 8.95% Non-Convertible Debentures [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 448 448  
Later than one year and not later than three years [Member] | 6% Non-Cumulative Compulsorily Convertible Preference Shares [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     30
Later than one year and not later than three years [Member] | Lease liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 1,527 1,336 774
Later than one year and not later than three years [Member] | Other liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     18
Later than one year and not later than three years [Member] | Borrowing from banks [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 8,006 8,020 7,922
Later than one year and not later than three years [Member] | Supplier finance arrangements [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0    
Later than one year and not later than three years [Member] | Borrowings from others [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 1,716 2,169 2,186
Later than one year and not later than three years [Member] | Other financial liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 0  
Later than one year and not later than three years [Member] | Trade payables [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 0  
Later than one year and not later than three years [Member] | Trade and other payables [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     0
Later than three years and not later than five years [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 8,533 10,105 7,893
Later than three years and not later than five years [Member] | Bank overdrafts [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 0 0
Later than three years and not later than five years [Member] | 6% Compulsorily Convertible Debentures [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 480 1,200 1,056
Later than three years and not later than five years [Member] | 8.95% Non-Convertible Debentures [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 686 448  
Later than three years and not later than five years [Member] | 6% Non-Cumulative Compulsorily Convertible Preference Shares [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     30
Later than three years and not later than five years [Member] | Lease liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 791 1,043 531
Later than three years and not later than five years [Member] | Other liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     0
Later than three years and not later than five years [Member] | Borrowing from banks [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 4,886 6,366 5,536
Later than three years and not later than five years [Member] | Supplier finance arrangements [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 0  
Later than three years and not later than five years [Member] | Borrowings from others [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 1,690 1,048 740
Later than three years and not later than five years [Member] | Other financial liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 0  
Later than three years and not later than five years [Member] | Trade payables [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 0  
Later than three years and not later than five years [Member] | Trade and other payables [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     0
Later than five years [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 23,524 27,045 15,690
Later than five years [Member] | Bank overdrafts [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 0 0
Later than five years [Member] | 6% Compulsorily Convertible Debentures [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 121 5,439 5,464
Later than five years [Member] | 8.95% Non-Convertible Debentures [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 3,156 4,626  
Later than five years [Member] | 6% Non-Cumulative Compulsorily Convertible Preference Shares [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     30
Later than five years [Member] | Lease liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 7,729 7,473 6,696
Later than five years [Member] | Other liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     0
Later than five years [Member] | Borrowing from banks [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 6,069 6,046 3,500
Later than five years [Member] | Supplier finance arrangements [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 0  
Later than five years [Member] | Borrowings from others [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 6,413 3,425 0
Later than five years [Member] | Other financial liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 0  
Later than five years [Member] | Trade payables [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 0  
Later than five years [Member] | Trade and other payables [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     0
Contractual Cash Flows [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 73,652 75,402 58,172
Contractual Cash Flows [Member] | Bank overdrafts [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 0 326 531
Contractual Cash Flows [Member] | 6% Compulsorily Convertible Debentures [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 1,321 8,439 8,632
Contractual Cash Flows [Member] | 8.95% Non-Convertible Debentures [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 4,514 5,746  
Contractual Cash Flows [Member] | 6% Non-Cumulative Compulsorily Convertible Preference Shares [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     120
Contractual Cash Flows [Member] | Lease liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 10,852 10,541 8,589
Contractual Cash Flows [Member] | Other liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     1,612
Contractual Cash Flows [Member] | Borrowing from banks [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 30,924 27,624 22,515
Contractual Cash Flows [Member] | Supplier finance arrangements [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 4,067 4,159  
Contractual Cash Flows [Member] | Borrowings from others [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 11,132 8,295 4,221
Contractual Cash Flows [Member] | Other financial liabilities [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows 3,387 2,220  
Contractual Cash Flows [Member] | Trade payables [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows ₨ 7,455 ₨ 8,052  
Contractual Cash Flows [Member] | Trade and other payables [Member]      
Non-derivative financial liabilities      
Non-derivative financial liabilities, undiscounted cash flows     ₨ 11,952