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Reclassification Out of Accumulated Other Comprehensive Income (OCI) by Income line Item and the Related Tax Effect (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2023 INR (₨)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 INR (₨)
AFS debt securities:
Allowance on AFS debt securities	₨ 70.9	$ 0.9	₨ (2,915.1)
Net of income tax	(1,336.9)		(10,187.7)
AFS debt Securities
AFS debt securities:
Net of income tax	(1,336.9)		(10,187.7)
Reclassification out of Accumulated Other Comprehensive Income | AFS debt Securities
AFS debt securities:
Realized (gain)/loss on sales of AFS debt securities, net	(1,857.5)	(22.7)	(10,699.4)
Allowance on AFS debt securities	70.9	0.9	(2,915.1)
Total before income tax	(1,786.6)	(21.8)	(13,614.5)
Income tax	449.7	5.5	3,426.8
Net of income tax	₨ (1,336.9)	$ (16.3)	₨ (10,187.7)

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Amount of increase (decrease) in allowance for credit loss of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), excluding other-than-temporary impairment (OTTI).

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Amount before tax of reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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