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Financial Risk Management (Details 2) - INR (₨) ₨ in Thousands | Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
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Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | ₨ 53,836,604 | ₨ 47,109,216 | ₨ 38,277,649
Bank overdrafts [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 326,327 | 486,888 | 951,504
6% Compulsory Convertible Debentures |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 6,259,685 | 7,156,074 | 4,000,000
8.95% Non-Convertible Debentures |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 2,500,000 |  |
6% Non Cumulative Compulsory convertible preference shares |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows |  | 500,000 | 500,000
Lease liabilities [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 3,810,238 | 3,042,839 | 2,451,179
Other liabilities [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows |  | 1,612,496 | 2,059,524
Borrowing from banks [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 23,424,521 | 18,794,380 | 14,982,750
Borrowings from others [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 3,189,675 | 3,564,494 | 2,045,239
Trade and other payables [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 14,326,158 | 11,952,045 | 11,287,453
Not later than one year [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 25,010,626 | 22,076,202 | 21,533,874
Not later than one year [Member] | Bank overdrafts [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 326,327 | 531,000 | 951,504
Not later than one year [Member] | 6% Compulsory Convertible Debentures |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 600,000 | 528,003 | 240,003
Not later than one year [Member] | 8.95% Non-Convertible Debentures |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 223,800 |  |
Not later than one year [Member] | 6% Non Cumulative Compulsory convertible preference shares |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows |  | 30,000 | 0
Not later than one year [Member] | Lease liabilities [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 689,151 | 587,700 | 585,790
Not later than one year [Member] | Other liabilities [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows |  | 1,594,551 | 2,039,624
Not later than one year [Member] | Borrowing from banks [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 7,434,489 | 5,557,466 | 5,680,600
Not later than one year [Member] | Borrowings from others [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 1,410,701 | 1,295,437 | 748,900
Not later than one year [Member] | Trade and other payables [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 14,326,158 | 11,952,045 | 11,287,453
Later than one year and not later than three years [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 13,172,481 | 12,514,148 | 8,432,988
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% Compulsory Convertible Debentures |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 1,200,000 | 1,584,000 | 720,000
Later than one year and not later than three years [Member] | 8.95% Non-Convertible Debentures |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 447,600 |  |
Later than one year and not later than three years [Member] | 6% Non Cumulative Compulsory convertible preference shares |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows |  | 30,000 | 0
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 | 1,335,567 | 773,500 | 788,588
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 |  | 17,945 | 19,900
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 | 8,495,464 | 7,922,227 | 5,755,100
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 | 1,693,850 | 2,186,476 | 1,149,400
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 | 0 | 0
Later than three years and not later than five years [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 10,105,220 | 7,893,011 | 6,298,719
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% Compulsory Convertible Debentures |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 1,200,000 | 1,056,003 | 480,003
Later than three years and not later than five years [Member] | 8.95% Non-Convertible Debentures |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 447,600 |  |
Later than three years and not later than five years [Member] | 6% Non Cumulative Compulsory convertible preference shares |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows |  | 30,000 | 0
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 | 1,043,869 | 531,200 | 555,216
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 | 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 | 6,831,617 | 5,536,029 | 4,800,000
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 | 582,134 | 739,779 | 463,500
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 | 0 | 0
Later than five years [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 27,009,555 | 15,689,971 | 12,492,593
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% Compulsory Convertible Debentures |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 5,438,693 | 5,463,871 | 4,600,657
Later than five years [Member] | 8.95% Non-Convertible Debentures |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 4,626,100 |  |
Later than five years [Member] | 6% Non Cumulative Compulsory convertible preference shares |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows |  | 30,000 | 500,000
Later than five years [Member] | Lease liabilities [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 7,473,255 | 6,696,300 | 3,773,736
Later than five years [Member] | Other liabilities [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows |  | 0 | 0
Later than five years [Member] | Borrowing from banks [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 9,380,885 | 3,499,800 | 3,618,200
Later than five years [Member] | Borrowings from others [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 90,622 | 0 | 0
Later than five years [Member] | Trade and other payables [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 0 | 0 | 0
Contractual Cash Flows [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 75,297,882 | 58,173,332 | 48,758,174
Contractual Cash Flows [Member] | Bank overdrafts [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 326,327 | 531,000 | 951,504
Contractual Cash Flows [Member] | 6% Compulsory Convertible Debentures |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 8,438,693 | 8,631,877 | 6,040,663
Contractual Cash Flows [Member] | 8.95% Non-Convertible Debentures |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 5,745,100 |  |
Contractual Cash Flows [Member] | 6% Non Cumulative Compulsory convertible preference shares |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows |  | 120,000 | 500,000
Contractual Cash Flows [Member] | Lease liabilities [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 10,541,842 | 8,588,700 | 5,703,330
Contractual Cash Flows [Member] | Other liabilities [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows |  | 1,612,496 | 2,059,524
Contractual Cash Flows [Member] | Borrowing from banks [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 32,142,455 | 22,515,522 | 19,853,900
Contractual Cash Flows [Member] | Borrowings from others [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | 3,777,307 | 4,221,692 | 2,361,800
Contractual Cash Flows [Member] | Trade and other payables [Member] |  |  |
Non-derivative financial liabilities |  |  |
Non-derivative financial liabilities, undiscounted cash flows | ₨ 14,326,158 | ₨ 11,952,045 | ₨ 11,287,453

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