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Comparison of Fair Values and Carrying Values of Financial Instruments (Detail) ₨ in Millions, $ in Millions | Mar. 31, 2017 INR (₨) | Mar. 31, 2017 USD ($) | Mar. 31, 2016 INR (₨) | Mar. 31, 2016 USD ($) | Mar. 31, 2015 INR (₨) | Mar. 31, 2014 INR (₨)
--- | --- | --- | --- | --- | --- | ---
Financial Assets: |  |  |  |  |  |  |
Cash and cash equivalents |  | ₨ 430,708.6 | $ 6,641.6 | ₨ 377,671.7 | $ 5,823.8 | ₨ 341,124.3 | ₨ 370,835.2
Term placements |  | 131,069.5 | 2,021.1 | 148,899.8 |  |  |
Investments held for trading |  | 35,363.7 | 545.3 | 71,860.9 |  |  |
Investments available for sale | [1] | 2,110,677.4 | 32,547.1 | 1,877,975.6 |  |  |
Securities purchased under agreements to resell |  | 50,000.0 | 771.0 | 1,019.9 |  |  |
Loans |  | 5,910,412.8 | 91,139.7 | 4,935,474.3 |  |  |
Accrued interest receivable |  | 67,356.6 | 1,038.7 | 58,276.4 |  |  |
Other assets |  | 190,567.3 | 2,938.6 | 132,220.5 |  |  |
Financial Liabilities: |  |  |  |  |  |  |
Interest-bearing deposits |  | 5,277,644.0 | 81,382.3 | 4,575,414.5 |  |  |
Non-interest-bearingdeposits |  | 1,153,678.9 | 17,790.0 | 882,445.8 |  |  |
Securities sold under repurchase agreements |  | 0.0 | 0.0 | 306,060.0 |  |  |
Short-term borrowings |  | 322,265.6 | 4,969.4 | 253,562.4 |  |  |
Accrued interest payable |  | 44,487.6 | 686.0 | 41,184.3 |  |  |
Long-term debt |  | 730,920.7 | 11,270.9 | 522,313.5 |  |  |
Accrued expenses and other liabilities |  | 449,454.6 | 6,930.7 | 229,628.0 |  |  |
Financial Assets: |  |  |  |  |  |  |
Cash and cash equivalents |  | 430,708.6 | 6,641.6 | 377,671.7 |  |  |
Term placements |  | 130,997.9 | 2,020.0 | 148,799.4 |  |  |
Investments held for trading |  | 35,363.7 | 545.3 | 71,860.9 |  |  |
Investments available for sale | [1] | 2,110,677.4 | 32,547.1 | 1,877,975.6 |  |  |
Securities purchased under agreements to resell |  | 50,000.0 | 771.0 | 1,019.9 |  |  |
Loans |  | 5,961,739.0 | 91,931.2 | 4,964,357.4 |  |  |
Accrued interest receivable |  | 67,356.6 | 1,038.7 | 58,276.4 |  |  |
Other assets |  | 189,085.7 | 2,915.7 | 130,716.0 |  |  |
Financial Liabilities: |  |  |  |  |  |  |
Securities sold under repurchase agreements |  | 0.0 | 0.0 | 306,060.0 |  |  |
Short-term borrowings |  | 321,708.0 | 4,960.8 | 251,572.8 |  |  |
Accrued interest payable |  | 44,487.6 | 686.0 | 41,184.3 |  |  |
Long-term debt |  | 758,454.8 | 11,695.5 | 587,196.0 |  |  |
Accrued expenses and other liabilities |  | 449,454.6 | 6,930.7 | 229,628.0 |  |  |
Estimated Fair Value |  |  |  |  |  |  |
Financial Assets: |  |  |  |  |  |  |
Investments available for sale | [1] | 2,110,677.4 | 32,547.1 | 1,877,975.6 |  |  |
Financial Assets: |  |  |  |  |  |  |
Investments available for sale | [1] | 2,110,677.4 | 32,547.1 | 1,877,975.6 |  |  |
Interest Bearing Deposits Liabilities |  |  |  |  |  |  |
Financial Liabilities: |  |  |  |  |  |  |
Deposits |  | 5,316,226.4 | 81,977.3 | 4,607,536.5 |  |  |
Non-interest-bearing deposits |  |  |  |  |  |  |
Financial Liabilities: |  |  |  |  |  |  |
Deposits |  | 1,153,678.9 | $ 17,790.0 | 882,445.8 |  |  |
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |
Financial Assets: |  |  |  |  |  |  |
Investments held for trading |  | 4.8 |  | 4,850.7 |  |  |
Financial Assets: |  |  |  |  |  |  |
Cash and cash equivalents |  | 430,708.6 |  | 377,671.7 |  |  |
Term placements |  | 0.0 |  | 0.0 |  |  |
Investments held for trading |  | 4.8 |  | 4,850.7 |  |  |
Securities purchased under agreements to resell |  | 0.0 |  | 0.0 |  |  |
Loans |  | 0.0 |  | 0.0 |  |  |
Accrued interest receivable |  | 0.0 |  | 0.0 |  |  |
Other assets |  | 0.0 |  | 0.0 |  |  |
Financial Liabilities: |  |  |  |  |  |  |
Securities sold under repurchase agreements |  | 0.0 |  | 0.0 |  |  |
Short-term borrowings |  | 0.0 |  | 0.0 |  |  |
Accrued interest payable |  | 0.0 |  | 0.0 |  |  |
Long-term debt |  | 0.0 |  | 0.0 |  |  |
Accrued expenses and other liabilities |  | 0.0 |  | 0.0 |  |  |
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) | Estimated Fair Value |  |  |  |  |  |  |
Financial Assets: |  |  |  |  |  |  |
Investments available for sale | [1] | 8,198.7 |  | 44,045.7 |  |  |
Financial Assets: |  |  |  |  |  |  |
Investments available for sale | [1] | 8,198.7 |  | 44,045.7 |  |  |
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) | Interest Bearing Deposits Liabilities |  |  |  |  |  |  |
Financial Liabilities: |  |  |  |  |  |  |
Deposits |  | 0.0 |  | 0.0 |  |  |
Fair Value Measurements Using Quoted Prices In Active Markets for Identical Assets (Level 1) | Non-interest-bearing deposits |  |  |  |  |  |  |
Financial Liabilities: |  |  |  |  |  |  |
Deposits |  | 0.0 |  | 0.0 |  |  |
Fair Value Measurements Using Significant other observable inputs (Level 2) |  |  |  |  |  |  |
Financial Assets: |  |  |  |  |  |  |
Investments held for trading |  | 35,358.9 |  | 67,010.2 |  |  |
Financial Assets: |  |  |  |  |  |  |
Cash and cash equivalents |  | 0.0 |  | 0.0 |  |  |
Term placements |  | 130,997.9 |  | 148,799.4 |  |  |
Investments held for trading |  | 35,358.9 |  | 67,010.2 |  |  |
Securities purchased under agreements to resell |  | 50,000.0 |  | 1,019.9 |  |  |
Loans |  | 1,791,981.2 |  | 1,489,193.0 |  |  |
Accrued interest receivable |  | 67,356.6 |  | 58,276.4 |  |  |
Other assets |  | 189,085.7 |  | 130,716.0 |  |  |
Financial Liabilities: |  |  |  |  |  |  |
Securities sold under repurchase agreements |  | 0.0 |  | 306,060.0 |  |  |
Short-term borrowings |  | 321,708.0 |  | 251,572.8 |  |  |
Accrued interest payable |  | 44,487.6 |  | 41,184.3 |  |  |
Long-term debt |  | 758,454.8 |  | 587,196.0 |  |  |
Accrued expenses and other liabilities |  | 449,454.6 |  | 229,628.0 |  |  |
Fair Value Measurements Using Significant other observable inputs (Level 2) | Estimated Fair Value |  |  |  |  |  |  |
Financial Assets: |  |  |  |  |  |  |
Investments available for sale | [1] | 2,080,579.6 |  | 1,816,921.8 |  |  |
Financial Assets: |  |  |  |  |  |  |
Investments available for sale | [1] | 2,080,579.6 |  | 1,816,921.8 |  |  |
Fair Value Measurements Using Significant other observable inputs (Level 2) | Interest Bearing Deposits Liabilities |  |  |  |  |  |  |
Financial Liabilities: |  |  |  |  |  |  |
Deposits |  | 5,316,226.4 |  | 4,607,536.5 |  |  |
Fair Value Measurements Using Significant other observable inputs (Level 2) | Non-interest-bearing deposits |  |  |  |  |  |  |
Financial Liabilities: |  |  |  |  |  |  |
Deposits |  | 1,153,678.9 |  | 882,445.8 |  |  |
Fair Value Measurements Using Significant unobservable inputs (Level 3) |  |  |  |  |  |  |
Financial Assets: |  |  |  |  |  |  |
Investments held for trading |  | 0.0 |  | 0.0 |  |  |
Financial Assets: |  |  |  |  |  |  |
Cash and cash equivalents |  | 0.0 |  | 0.0 |  |  |
Term placements |  | 0.0 |  | 0.0 |  |  |
Investments held for trading |  | 0.0 |  | 0.0 |  |  |
Securities purchased under agreements to resell |  | 0.0 |  | 0.0 |  |  |
Loans |  | 4,169,757.8 |  | 3,475,164.4 |  |  |
Accrued interest receivable |  | 0.0 |  | 0.0 |  |  |
Other assets |  | 0.0 |  | 0.0 |  |  |
Financial Liabilities: |  |  |  |  |  |  |
Securities sold under repurchase agreements |  | 0.0 |  | 0.0 |  |  |
Short-term borrowings |  | 0.0 |  | 0.0 |  |  |
Accrued interest payable |  | 0.0 |  | 0.0 |  |  |
Long-term debt |  | 0.0 |  | 0.0 |  |  |
Accrued expenses and other liabilities |  | 0.0 |  | 0.0 |  |  |
Fair Value Measurements Using Significant unobservable inputs (Level 3) | Estimated Fair Value |  |  |  |  |  |  |
Financial Assets: |  |  |  |  |  |  |
Investments available for sale | [1] | 21,899.1 |  | 17,008.1 |  |  |
Financial Assets: |  |  |  |  |  |  |
Investments available for sale | [1] | 21,899.1 |  | 17,008.1 |  |  |
Fair Value Measurements Using Significant unobservable inputs (Level 3) | Interest Bearing Deposits Liabilities |  |  |  |  |  |  |
Financial Liabilities: |  |  |  |  |  |  |
Deposits |  | 0.0 |  | 0.0 |  |  |
Fair Value Measurements Using Significant unobservable inputs (Level 3) | Non-interest-bearing deposits |  |  |  |  |  |  |
Financial Liabilities: |  |  |  |  |  |  |
Deposits |  | ₨ 0.0 |  | ₨ 0.0 |  |  |
[1] | excluding investments carried at cost Rs. 708.2 million (US$10.9 million) (as at March 31, 2016, Rs.708.8 million)

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3044-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(1)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date. + References No definition available. + Details
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- Definition Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26626-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562 + Details
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