v3.25.2
Business Combination - Major Class of Identifiable Acquired Intangible Assets and Estimated Period of Amortisation (Detail) - Jul. 01, 2023
₨ in Millions, $ in Millions
INR (₨)
USD ($)
Finite-Lived Intangible Assets [Line Items]    
Total ₨ 1,434,818.1 $ 16,795.2
Brand [Member] | Relief from royalty method [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated Fair Value ₨ 750,758.2 8,788.0
Valuation Methodology Relief from royalty method  
Investment management contract [Member] | Multi-period excess earnings method [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated Fair Value ₨ 369,785.6 4,328.5
Valuation Methodology Multi-period excess earnings method  
Value of business acquired [Member] | Refer below [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated Fair Value ₨ 221,738.5 2,595.6
Valuation Methodology Refer below  
Distribution network [Member] | Multi-period excess earnings method [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated Fair Value ₨ 59,543.2 697.0
Useful lives (in years) 17 years  
Valuation Methodology Multi-period excess earnings method  
Customer relationship [Member] | Multi-period excess earnings method [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated Fair Value ₨ 29,874.9 349.6
Useful lives (in years) 17 years  
Valuation Methodology Multi-period excess earnings method  
Transferable development rights [Member] | Comparison method [Member]    
Finite-Lived Intangible Assets [Line Items]    
Estimated Fair Value ₨ 3,117.7 $ 36.5
Useful lives (in years) 8 years  
Valuation Methodology Comparison method