v3.26.1
Financial Risk Management (Details 3) - INR (₨)
₨ in Millions
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows ₨ 22,143 ₨ 21,596 ₨ 19,355
Cash and bank balances      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 4,098 6,304 5,394
Restricted cash      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 974 454 440
Trade receivables      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 12,648 10,916 10,155
Other financial assets      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 3,018 [1] 2,693 2,162
Investments      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 1,405 1,229 1,204
Not later than one year [Member]      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 17,926 17,972 16,147
Not later than one year [Member] | Cash and bank balances      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 4,098 6,304 5,394
Not later than one year [Member] | Restricted cash      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 974 454 440
Not later than one year [Member] | Trade receivables      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 12,648 10,916 10,155
Not later than one year [Member] | Other financial assets      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 206 [1] 298 158
Not later than one year [Member] | Investments      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 0 0
Later than one year and not later than three years [Member]      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 2,019 1,652 1,295
Later than one year and not later than three years [Member] | Cash and bank balances      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 0 0
Later than one year and not later than three years [Member] | Restricted cash      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 0 0
Later than one year and not later than three years [Member] | Trade receivables      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 0 0
Later than one year and not later than three years [Member] | Other financial assets      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 2,019 [1] 1,652 1,295
Later than one year and not later than three years [Member] | Investments      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 0 0
Later than three years and not later than five years [Member]      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 0 0
Later than three years and not later than five years [Member] | Cash and bank balances      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 0 0
Later than three years and not later than five years [Member] | Restricted cash      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 0 0
Later than three years and not later than five years [Member] | Trade receivables      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 0 0
Later than three years and not later than five years [Member] | Other financial assets      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 [1] 0 0
Later than three years and not later than five years [Member] | Investments      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 0 0
Later than five years [Member]      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 2,198 1,972 1,913
Later than five years [Member] | Cash and bank balances      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 0 0
Later than five years [Member] | Restricted cash      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 0 0
Later than five years [Member] | Trade receivables      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 0 0 0
Later than five years [Member] | Other financial assets      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 793 [1] 743 709
Later than five years [Member] | Investments      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 1,405 1,229 1,204
Contractual Cash Flows [Member]      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 22,143 21,596 19,355
Contractual Cash Flows [Member] | Cash and bank balances      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 4,098 6,304 5,394
Contractual Cash Flows [Member] | Restricted cash      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 974 454 440
Contractual Cash Flows [Member] | Trade receivables      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 12,648 10,916 10,155
Contractual Cash Flows [Member] | Other financial assets      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows 3,018 [1] 2,693 2,162
Contractual Cash Flows [Member] | Investments      
Disclosure of financial risk management [Line Items]      
Non-derivative financial assets, undiscounted cash flows ₨ 1,405 ₨ 1,229 ₨ 1,204
[1] 0 represents value less than rounding off norm adopted by the Group.