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Funded Status of Gratuity Plan and Amounts Recognized in Bank's Financial Statements (Detail) - Gratuity ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2016 INR (₨)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 INR (₨)	Mar. 31, 2014 INR (₨)	Mar. 31, 2016 USD ($)
Change in benefit obligations:
Projected benefit obligation ("PBO"), beginning of the period	₨ 3,105.9	$ 46.9	₨ 2,374.3
Service cost	513.3	7.7	504.7	₨ 388.8
Interest cost	256.1	3.9	182.4	178.7
Actuarial (gains)/ losses	(41.7)	(0.6)	204.4
Benefits paid	(243.0)	(3.7)	(159.9)
Projected benefit obligation, end of the period	3,590.6	54.2	3,105.9	2,374.3
Change in plan assets:
Fair value of plan assets, beginning of the period	2,428.8	36.7	1,726.0
Expected return on plan assets	212.3	3.2	166.2	121.1
Actuarial gains/(losses)	(136.9)	(2.1)	213.5
Actual return on plan assets	75.4	1.1	379.7
Employer contributions	618.1	9.4	483.0
Benefits paid	(243.0)	(3.7)	(159.9)
Fair value of plan assets, end of the period	2,879.3	$ 43.5	2,428.8	₨ 1,726.0
Funded Status	₨ (711.3)		₨ (677.1)		$ (10.7)

X

- Definition

The net increase or decrease of changes in the value of the benefit obligation resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.

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The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of contributions made by the employer to defined benefit plans.

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An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

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Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

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