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Balances Payable to Related Parties (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2021 INR (₨)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 INR (₨)
Related Party Transaction [Line Items]
Balances in non-interest-bearing deposits	₨ 2,110,762.4	$ 28,859.2	₨ 1,731,590.0
Balances in interest-bearing deposits	11,226,467.8	153,492.9	9,730,481.3
Principal Owner
Related Party Transaction [Line Items]
Balances in non-interest-bearing deposits	31,834.6		35,128.7
Balances in interest-bearing deposits	3,772.1		1,662.0
Accrued expenses and other liabilities	1,110.5		1,002.8
Total	36,717.2		37,793.5
Others
Related Party Transaction [Line Items]
Balances in non-interest-bearing deposits	9,732.0		8,258.8
Balances in interest-bearing deposits	1,830.5		5,954.8
Accrued expenses and other liabilities	0.0		0.0
Total	11,562.5		14,213.6
Related Party
Related Party Transaction [Line Items]
Balances in non-interest-bearing deposits	41,566.6	568.3	43,387.5
Balances in interest-bearing deposits	5,602.6	76.6	7,616.8
Accrued expenses and other liabilities	1,110.5	15.2	1,002.8
Total	₨ 48,279.7	$ 660.1	₨ 52,007.1

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Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, compensation costs, payroll taxes and fringe benefits (other than pension and postretirement obligations), contractual rights and obligations, and statutory obligations.

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Carrying amount as of the balance sheet date of obligations due all related parties.

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