Interest-bearing loans and borrowings - long term - Summary of non convertible debentures (Secured) (Detail) - Secured Non Convertible Debentures
₨ / shares in Units, ₨ in Millions, $ in Millions |
12 Months Ended |
|
|
|
Mar. 31, 2025
INR (₨)
₨ / shares
shares
|
Mar. 31, 2025
USD ($)
shares
|
Mar. 31, 2024
INR (₨)
shares
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Net of transaction cost |
₨ 72,974
|
$ 854
|
₨ 63,310
|
| Transaction costs, discount on issue and premium on redemption |
4,102
|
48
|
2,999
|
| Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Net of transaction cost |
₨ 68,872
|
$ 806
|
₨ 60,311
|
| Tranche One | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 1,000,000
|
|
|
| Numbers of NCDs outstanding | shares |
1,945
|
1,945
|
2,305
|
| Net of transaction cost |
₨ 1,945
|
$ 23
|
₨ 2,305
|
| Interest rate % |
9.75%
|
9.75%
|
|
| Earliest redemption date |
Sep. 30, 2025
|
|
|
| Last date of repayment |
Oct. 31, 2026
|
|
|
| Terms of repayment |
Half yearly
|
|
|
| Tranche Two | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 1,000,000
|
|
|
| Numbers of NCDs outstanding | shares |
951
|
951
|
1,033
|
| Net of transaction cost |
₨ 951
|
$ 11
|
₨ 1,033
|
| Interest rate % |
9.10%
|
9.10%
|
|
| Earliest redemption date |
Sep. 30, 2025
|
|
|
| Last date of repayment |
Sep. 30, 2034
|
|
|
| Terms of repayment |
Half yearly
|
|
|
| Tranche Three | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 1,000,000
|
|
|
| Numbers of NCDs outstanding | shares |
3,964
|
3,964
|
4,305
|
| Net of transaction cost |
₨ 3,964
|
$ 46
|
₨ 4,305
|
| Interest rate % |
9.10%
|
9.10%
|
|
| Earliest redemption date |
Sep. 30, 2025
|
|
|
| Last date of repayment |
Sep. 30, 2034
|
|
|
| Terms of repayment |
Half yearly
|
|
|
| Tranche Four | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Non listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 1,000,000
|
|
|
| Numbers of NCDs outstanding | shares |
1,342
|
1,342
|
1,445
|
| Net of transaction cost |
₨ 1,342
|
$ 16
|
₨ 1,445
|
| Interest rate % |
6.03%
|
6.03%
|
|
| Earliest redemption date |
Feb. 28, 2026
|
|
|
| Last date of repayment |
Aug. 22, 2026
|
|
|
| Terms of repayment |
Yearly
|
|
|
| Tranche Five | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Non listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 1,000,000
|
|
|
| Numbers of NCDs outstanding | shares |
5,863
|
5,863
|
6,314
|
| Net of transaction cost |
₨ 5,863
|
$ 69
|
₨ 6,314
|
| Interest rate % |
6.03%
|
6.03%
|
|
| Earliest redemption date |
Feb. 28, 2026
|
|
|
| Last date of repayment |
Aug. 22, 2026
|
|
|
| Terms of repayment |
Yearly
|
|
|
| Tranche Six | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Non listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 1,000,000
|
|
|
| Numbers of NCDs outstanding | shares |
3,323
|
3,323
|
3,579
|
| Net of transaction cost |
₨ 3,323
|
$ 39
|
₨ 3,579
|
| Interest rate % |
6.03%
|
6.03%
|
|
| Earliest redemption date |
Feb. 28, 2026
|
|
|
| Last date of repayment |
Aug. 22, 2026
|
|
|
| Terms of repayment |
Yearly
|
|
|
| Tranche Seven | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Non listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 1,000,000
|
|
|
| Numbers of NCDs outstanding | shares |
10,157
|
10,157
|
10,939
|
| Net of transaction cost |
₨ 10,157
|
$ 119
|
₨ 10,939
|
| Interest rate % |
6.03%
|
6.03%
|
|
| Earliest redemption date |
Feb. 28, 2026
|
|
|
| Last date of repayment |
Aug. 22, 2026
|
|
|
| Terms of repayment |
Yearly
|
|
|
| Tranche Eight | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Non listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 1,000,000
|
|
|
| Numbers of NCDs outstanding | shares |
1,504
|
1,504
|
1,620
|
| Net of transaction cost |
₨ 1,504
|
$ 18
|
₨ 1,620
|
| Interest rate % |
6.03%
|
6.03%
|
|
| Earliest redemption date |
Feb. 28, 2026
|
|
|
| Last date of repayment |
Aug. 22, 2026
|
|
|
| Terms of repayment |
Yearly
|
|
|
| Tranche Nine | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Non listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 1,000,000
|
|
|
| Numbers of NCDs outstanding | shares |
3,175
|
3,175
|
3,419
|
| Net of transaction cost |
₨ 3,175
|
$ 37
|
₨ 3,419
|
| Interest rate % |
6.03%
|
6.03%
|
|
| Earliest redemption date |
Feb. 28, 2026
|
|
|
| Last date of repayment |
Aug. 22, 2026
|
|
|
| Terms of repayment |
Yearly
|
|
|
| Tranche Ten | Gross carrying amount |
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|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Non listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 1,000,000
|
|
|
| Numbers of NCDs outstanding | shares |
3,841
|
3,841
|
4,136
|
| Net of transaction cost |
₨ 3,841
|
$ 45
|
₨ 4,136
|
| Interest rate % |
6.03%
|
6.03%
|
|
| Earliest redemption date |
Feb. 28, 2026
|
|
|
| Last date of repayment |
Aug. 22, 2026
|
|
|
| Terms of repayment |
Yearly
|
|
|
| Tranche Eleven | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 100,000
|
|
|
| Numbers of NCDs outstanding | shares |
25,000
|
25,000
|
25,000
|
| Net of transaction cost |
₨ 2,500
|
$ 29
|
₨ 2,500
|
| Interest rate % |
9.55%
|
9.55%
|
|
| Earliest redemption date |
Aug. 11, 2026
|
|
|
| Last date of repayment |
Aug. 11, 2026
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Twelve | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Non listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 10
|
|
|
| Numbers of NCDs outstanding | shares |
36,732,513
|
36,732,513
|
36,732,513
|
| Net of transaction cost |
₨ 367
|
$ 4
|
₨ 367
|
| Interest rate % |
11.50%
|
11.50%
|
|
| Earliest redemption date |
Dec. 05, 2052
|
|
|
| Last date of repayment |
Dec. 05, 2052
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Thirteen | Gross carrying amount |
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|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Non listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 10
|
|
|
| Numbers of NCDs outstanding | shares |
26,661,237
|
26,661,237
|
26,661,237
|
| Net of transaction cost |
₨ 267
|
$ 3
|
₨ 267
|
| Interest rate % |
11.50%
|
11.50%
|
|
| Earliest redemption date |
Feb. 16, 2053
|
|
|
| Last date of repayment |
Feb. 16, 2053
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Fourteen | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Non listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 10
|
|
|
| Numbers of NCDs outstanding | shares |
9,594,200
|
9,594,200
|
9,594,200
|
| Net of transaction cost |
₨ 96
|
$ 1
|
₨ 96
|
| Interest rate % |
11.50%
|
11.50%
|
|
| Earliest redemption date |
Nov. 09, 2053
|
|
|
| Last date of repayment |
Nov. 09, 2053
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Fifteen | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Non listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 10
|
|
|
| Numbers of NCDs outstanding | shares |
23,598,000
|
23,598,000
|
23,598,000
|
| Net of transaction cost |
₨ 236
|
$ 3
|
₨ 236
|
| Interest rate % |
11.50%
|
11.50%
|
|
| Earliest redemption date |
Nov. 09, 2053
|
|
|
| Last date of repayment |
Nov. 09, 2053
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Sixteen | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Non listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 100,000
|
|
|
| Numbers of NCDs outstanding | shares |
20,000
|
20,000
|
20,000
|
| Net of transaction cost |
₨ 2,000
|
$ 23
|
₨ 2,000
|
| Interest rate % |
9.30%
|
9.30%
|
|
| Earliest redemption date |
Jun. 01, 2026
|
|
|
| Last date of repayment |
Jun. 01, 2026
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Seventeen | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 100,000
|
|
|
| Numbers of NCDs outstanding | shares |
1,500
|
1,500
|
1,500
|
| Net of transaction cost |
₨ 150
|
$ 2
|
₨ 150
|
| Interest rate % |
10.24%
|
10.24%
|
|
| Earliest redemption date |
May 25, 2026
|
|
|
| Last date of repayment |
May 25, 2026
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Eighteen | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 100,000
|
|
|
| Numbers of NCDs outstanding | shares |
0
|
0
|
3,400
|
| Net of transaction cost |
₨ 0
|
$ 0
|
₨ 340
|
| Interest rate % |
10.03%
|
10.03%
|
|
| Earliest redemption date |
Nov. 08, 2024
|
|
|
| Last date of repayment |
Nov. 08, 2024
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Nineteen | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 100,000
|
|
|
| Numbers of NCDs outstanding | shares |
0
|
0
|
2,600
|
| Net of transaction cost |
₨ 0
|
$ 0
|
₨ 260
|
| Interest rate % |
10.03%
|
10.03%
|
|
| Earliest redemption date |
Jan. 23, 2025
|
|
|
| Last date of repayment |
Jan. 23, 2025
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Twenty | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 100,000
|
|
|
| Numbers of NCDs outstanding | shares |
80,000
|
80,000
|
80,000
|
| Net of transaction cost |
₨ 8,000
|
$ 94
|
₨ 8,000
|
| Interest rate % |
10.18%
|
10.18%
|
|
| Earliest redemption date |
Apr. 30, 2025
|
|
|
| Last date of repayment |
Apr. 30, 2025
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Twenty One | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 100,000
|
|
|
| Numbers of NCDs outstanding | shares |
65,000
|
65,000
|
70,000
|
| Net of transaction cost |
₨ 6,500
|
$ 76
|
₨ 7,000
|
| Interest rate % |
9.90%
|
9.90%
|
|
| Earliest redemption date |
Dec. 31, 2025
|
|
|
| Last date of repayment |
Apr. 30, 2027
|
|
|
| Terms of repayment |
Yearly
|
|
|
| Tranche Twenty Two | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 10
|
|
|
| Numbers of NCDs outstanding | shares |
19,903,929
|
19,903,929
|
0
|
| Net of transaction cost |
₨ 199
|
$ 2
|
₨ 0
|
| Interest rate % |
11.50%
|
11.50%
|
|
| Earliest redemption date |
Jun. 28, 2054
|
|
|
| Last date of repayment |
Jun. 28, 2054
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Twenty Three | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 10
|
|
|
| Numbers of NCDs outstanding | shares |
6,799,118
|
6,799,118
|
0
|
| Net of transaction cost |
₨ 68
|
$ 1
|
₨ 0
|
| Interest rate % |
11.50%
|
11.50%
|
|
| Earliest redemption date |
Jun. 28, 2054
|
|
|
| Last date of repayment |
Jun. 28, 2054
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Twenty Four | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 10
|
|
|
| Numbers of NCDs outstanding | shares |
19,626,496
|
19,626,496
|
0
|
| Net of transaction cost |
₨ 196
|
$ 2
|
₨ 0
|
| Interest rate % |
11.50%
|
11.50%
|
|
| Earliest redemption date |
Jun. 28, 2054
|
|
|
| Last date of repayment |
Jun. 28, 2054
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Twenty Five | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 100,000
|
|
|
| Numbers of NCDs outstanding | shares |
50,000
|
50,000
|
0
|
| Net of transaction cost |
₨ 5,000
|
$ 59
|
₨ 0
|
| Interest rate % |
10.18%
|
10.18%
|
|
| Earliest redemption date |
Aug. 22, 2025
|
|
|
| Last date of repayment |
Aug. 22, 2025
|
|
|
| Terms of repayment |
Bullet
|
|
|
| Tranche Twenty Six | Gross carrying amount |
|
|
|
| Disclosure Of Detailed Information About Secured Non Convertible Debentures [Line Items] |
|
|
|
| Listing status |
Non listed
|
|
|
| Face value per NCD | ₨ / shares |
₨ 100,000
|
|
|
| Numbers of NCDs outstanding | shares |
72,278
|
72,278
|
0
|
| Net of transaction cost |
₨ 7,228
|
$ 85
|
₨ 0
|
| Interest rate % |
8.44%
|
8.44%
|
|
| Earliest redemption date |
Jun. 30, 2025
|
|
|
| Last date of repayment |
Aug. 31, 2029
|
|
|
| Terms of repayment |
Quarterly
|
|
|