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Right of use assets (Details)
₨ in Thousands, $ in Thousands
12 Months Ended
Mar. 31, 2025
INR (₨)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
INR (₨)
Disclosure of quantitative information about right-of-use assets [line items]      
Begining Balance ₨ 7,257,692   ₨ 5,689,423
Additions 2,691,875   2,293,224
Adjustments (350,313)   (19,514)
Depreciation (777,516)   (705,441)
Ending Balance 8,821,738 $ 103,080 7,257,692
Land [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Begining Balance 3,671,722   2,850,345
Additions 784,833   861,343
Adjustments (91,973)   0
Depreciation (51,238)   (39,966)
Ending Balance 4,313,344   3,671,722
Buildings [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Begining Balance 2,540,980   1,927,648
Additions 399,960   1,017,867
Adjustments (258,340)   (8,775)
Depreciation (392,595)   (395,760)
Ending Balance 2,290,005   2,540,980
P&M [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Begining Balance 244,011   349,874
Additions 977,607   26,940
Adjustments 0   (10,739)
Depreciation (185,881)   (122,064)
Ending Balance 1,035,737   244,011
IRU [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Begining Balance 800,979   561,556
Additions 529,475   387,074
Adjustments 0   0
Depreciation (147,802)   (147,651)
Ending Balance ₨ 1,182,652   ₨ 800,979