Insurance services - Summary of Balances of and Changes in Separate Account Liabilities (Detail) ₨ in Millions, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Mar. 31, 2026
INR (₨)
|
Mar. 31, 2026
USD ($)
|
Mar. 31, 2025
INR (₨)
|
|
| Separate Account, Liability [Line Items] | |||
| Beginning Balance | ₨ 1,016,281.4 | $ 10,831.2 | ₨ 955,416.3 |
| Premiums and deposits | 230,516.0 | 2,456.7 | 190,549.4 |
| Policy charges | (23,344.4) | (248.8) | (21,057.3) |
| Surrenders and withdrawals | (103,991.3) | (1,108.3) | (118,048.5) |
| Benefit payments | (70,349.9) | (749.8) | (72,456.2) |
| Investment performance | 5,379.5 | 57.3 | 86,785.5 |
| Other charges | (2,575.2) | (27.4) | (4,907.8) |
| Ending Balance | 1,051,916.1 | $ 11,210.9 | 1,016,281.4 |
| Unit-Linked Life [Member] | |||
| Separate Account, Liability [Line Items] | |||
| Beginning Balance | 821,559.8 | 790,711.5 | |
| Premiums and deposits | 174,060.2 | 144,941.9 | |
| Policy charges | (20,826.3) | (18,978.4) | |
| Surrenders and withdrawals | (86,181.1) | (93,686.8) | |
| Benefit payments | (65,691.7) | (68,275.4) | |
| Investment performance | 4,031.7 | 71,320.8 | |
| Other charges | (2,163.4) | (4,473.8) | |
| Ending Balance | 824,789.2 | 821,559.8 | |
| Unit-Linked Pension [Member] | |||
| Separate Account, Liability [Line Items] | |||
| Beginning Balance | 54,738.0 | 55,596.3 | |
| Premiums and deposits | 10,699.2 | 7,515.3 | |
| Policy charges | (804.8) | (789.3) | |
| Surrenders and withdrawals | (6,105.5) | (7,853.0) | |
| Benefit payments | (4,658.2) | (4,180.8) | |
| Investment performance | (320.3) | 4,643.4 | |
| Other charges | (112.7) | (193.9) | |
| Ending Balance | 53,435.7 | 54,738.0 | |
| Group Linked [Member] | |||
| Separate Account, Liability [Line Items] | |||
| Beginning Balance | 139,983.6 | 109,108.5 | |
| Premiums and deposits | 45,756.6 | 38,092.2 | |
| Policy charges | (1,713.3) | (1,289.6) | |
| Surrenders and withdrawals | (11,704.7) | (16,508.7) | |
| Benefit payments | 0.0 | 0.0 | |
| Investment performance | 1,668.1 | 10,821.3 | |
| Other charges | (299.1) | (240.1) | |
| Ending Balance | ₨ 173,691.2 | ₨ 139,983.6 | |