v3.26.1
Financial risk management (Details 2) - INR (₨)
₨ in Millions
Mar. 31, 2026
Mar. 31, 2025
Disclosure of Contractual Maturities of Significant Financial Liabilities [Line Items]    
Trade and other payables ₨ 33,411 ₨ 35,523
Short-term borrowings 59,135 38,045
Derivative financial instruments 6,898 1,286
Other liabilities and provisions 44,012 36,917
Not later than one year [member]    
Disclosure of Contractual Maturities of Significant Financial Liabilities [Line Items]    
Trade and other payables 33,411 35,523
Short-term borrowings 59,135 38,045
Derivative financial instruments 6,898 1,286
Other liabilities and provisions 43,582 35,870
Later than one year and not later than two years [member]    
Disclosure of Contractual Maturities of Significant Financial Liabilities [Line Items]    
Trade and other payables 0 0
Short-term borrowings 0 0
Derivative financial instruments 0 0
Other liabilities and provisions 357 97
Later than two years and not later than three years [member]    
Disclosure of Contractual Maturities of Significant Financial Liabilities [Line Items]    
Trade and other payables 0 0
Short-term borrowings 0 0
Derivative financial instruments 0 0
Other liabilities and provisions 73 51
Later than three years and not later than four years [member]    
Disclosure of Contractual Maturities of Significant Financial Liabilities [Line Items]    
Trade and other payables 0 0
Short-term borrowings 0 0
Derivative financial instruments 0 0
Other liabilities and provisions 0 50
Later than four years [Member]    
Disclosure of Contractual Maturities of Significant Financial Liabilities [Line Items]    
Trade and other payables 0 0
Short-term borrowings 0 0
Derivative financial instruments 0 0
Other liabilities and provisions ₨ 0 ₨ 849