v3.25.2
Long-term debt - Long-Term Debt and Related Contractual Rates and Maturity Dates (Detail)
₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2025
INR (₨)
Mar. 31, 2024
INR (₨)
Mar. 31, 2025
USD ($)
Debt Instrument [Line Items]      
Total ₨ 5,866,163.2 ₨ 6,648,772.0 $ 68,666.3
Perpetual debt—(1)      
Debt Instrument [Line Items]      
Total 137,564.2    
Subordinated debt | Subordinated debt (other than perpetual debt)      
Debt Instrument [Line Items]      
Total 293,902.2 276,600.6 3,440.3
Subordinated debt | Perpetual debt—(1)      
Debt Instrument [Line Items]      
Total ₨ 52,272.7 ₨ 47,290.8 $ 611.9
Subordinated debt | Perpetual debt—(2)      
Debt Instrument [Line Items]      
Maturity /Call dates 2027 2037  
Stated interest rates 3.70% 3.70% 3.70%
Total ₨ 85,291.5 ₨ 83,090.7 $ 998.4
Subordinated debt | Minimum | Subordinated debt (other than perpetual debt)      
Debt Instrument [Line Items]      
Maturity /Call dates 2026 2025  
Stated interest rates 6.67% 6.67% 6.67%
Subordinated debt | Minimum | Perpetual debt—(1)      
Debt Instrument [Line Items]      
Maturity /Call dates 2026 2029  
Stated interest rates 7.55% 7.55% 7.55%
Subordinated debt | Maximum | Subordinated debt (other than perpetual debt)      
Debt Instrument [Line Items]      
Maturity /Call dates 2035 2034  
Stated interest rates 9.70% 9.70% 9.70%
Subordinated debt | Maximum | Perpetual debt—(1)      
Debt Instrument [Line Items]      
Maturity /Call dates 2034 2038  
Stated interest rates 9.40% 9.40% 9.40%
Others | Variable rate—(1)      
Debt Instrument [Line Items]      
Total [1] ₨ 581,229.3 ₨ 479,577.3 $ 6,803.6
Others | Variable rate—(2)      
Debt Instrument [Line Items]      
Total [1] 623,118.6 1,235,079.0 7,293.9
Others | Fixed rate-(1)      
Debt Instrument [Line Items]      
Total [1] 3,955,489.6 4,313,107.4 46,300.8
Others | Fixed rate-(2)      
Debt Instrument [Line Items]      
Total [1] ₨ 274,859.3 ₨ 214,026.2 $ 3,217.4
Others | Minimum | Variable rate—(1)      
Debt Instrument [Line Items]      
Maturity /Call dates [1] 2026 2026  
Stated interest rates [1] 4.92% 6.10% 4.92%
Others | Minimum | Variable rate—(2)      
Debt Instrument [Line Items]      
Maturity /Call dates [1] 2026 2025  
Stated interest rates [1] 6.47% 6.21% 6.47%
Others | Minimum | Fixed rate-(1)      
Debt Instrument [Line Items]      
Maturity /Call dates [1] 2026 2025  
Stated interest rates [1] 2.80% 2.80% 2.80%
Others | Minimum | Fixed rate-(2)      
Debt Instrument [Line Items]      
Maturity /Call dates [1] 2026 2025  
Stated interest rates [1] 4.30% 5.18% 4.30%
Others | Maximum | Variable rate—(1)      
Debt Instrument [Line Items]      
Maturity /Call dates [1] 2030 2029  
Stated interest rates [1] 6.22% 6.51% 6.22%
Others | Maximum | Variable rate—(2)      
Debt Instrument [Line Items]      
Maturity /Call dates [1] 2032 2030  
Stated interest rates [1] 8.60% 9.00% 8.60%
Others | Maximum | Fixed rate-(1)      
Debt Instrument [Line Items]      
Maturity /Call dates [1] 2034 2034  
Stated interest rates [1] 9.05% 9.60% 9.05%
Others | Maximum | Fixed rate-(2)      
Debt Instrument [Line Items]      
Maturity /Call dates [1] 2029 2029  
Stated interest rates [1] 8.19% 8.19% 8.19%
[1] Variable rate — (1), Perpetual debt — (2) and Fixed rate — (2) represent foreign currency debt. Variable rate debt is typically indexed to SOFR, T-bill rates, Marginal cost of funds based lending rates (“MCLR”), among others.