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This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' 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Recorded as a cumulative effect adjustment to the beginning balance of retained earnings. Does not apply to registration payment arrangements that are no longer outstanding upon adoption of FSP EITF 00-19-2.","units":{"USD":[{"start":"2016-01-01","end":"2016-12-31","val":5458000,"accn":"0001193125-17-098753","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-28"},{"start":"2016-01-01","end":"2016-12-31","val":5458000,"accn":"0001193125-18-100592","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-29","frame":"CY2016"}]}},"RecognitionOfDeferredRevenue":{"label":"Recognition of Deferred Revenue","description":"The amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. For cash flows, this element primarily pertains to amortization of deferred credits on long-term arrangements. 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Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the 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The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.","units":{"USD":[{"end":"2021-09-30","val":1760000,"accn":"0001140361-21-037756","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1786000,"accn":"0001140361-22-012058","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-31","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1760000,"accn":"0001140361-22-019248","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-16","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1760000,"accn":"0001140361-22-029555","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-15","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1760000,"accn":"0001140361-22-041167","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1786000,"accn":"0001140361-23-014658","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1760000,"accn":"0001140361-23-024499","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-15","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1760000,"accn":"0001140361-23-039411","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1760000,"accn":"0001140361-23-052729","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-13","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1760000,"accn":"0001140361-24-016452","fy":2023,"fp":"FY","form":"10-K","filed":"2024-03-29","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1760000,"accn":"0001140361-24-026105","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-15","frame":"CY2024Q1I"},{"end":"2024-06-30","val":1760000,"accn":"0001140361-24-036937","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-13","frame":"CY2024Q2I"},{"end":"2024-09-30","val":1760000,"accn":"0001140361-24-046726","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":1760000,"accn":"0001140361-25-011169","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":1760000000,"accn":"0001140361-25-019149","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-15","frame":"CY2025Q1I"},{"end":"2025-06-30","val":1760000000,"accn":"0001140361-25-031039","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-14","frame":"CY2025Q2I"},{"end":"2025-09-30","val":1760000000,"accn":"0001140361-25-042116","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"},{"end":"2025-12-31","val":1760000000,"accn":"0001140361-26-012155","fy":2025,"fp":"FY","form":"10-K","filed":"2026-03-31","frame":"CY2025Q4I"},{"end":"2026-03-31","val":1760000000,"accn":"0001140361-26-021495","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-15","frame":"CY2026Q1I"}]}},"TemporaryEquityRedemptionValue":{"label":"Temporary Equity, Redemption Value (Deprecated 2014-01-31)","description":"The aggregate amount to be paid by the entity upon redemption of the security that is classified as temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.","units":{"USD":[{"end":"2013-06-30","val":241000,"accn":"0001193125-13-334603","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-14","frame":"CY2013Q2I"},{"end":"2013-09-30","val":241000,"accn":"0001193125-13-437143","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-12","frame":"CY2013Q3I"}]}},"TemporaryEquitySharesAuthorized":{"label":"Temporary Equity, Shares Authorized","description":"The maximum number of securities classified as temporary equity that are permitted to be issued by an entity's charter and bylaws. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.","units":{"shares":[{"end":"2020-12-31","val":1000,"accn":"0001140361-21-037756","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":1000,"accn":"0001140361-22-012058","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-31","frame":"CY2020Q4I"},{"end":"2021-09-30","val":1000,"accn":"0001140361-21-037756","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":1000,"accn":"0001140361-22-012058","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-31"},{"end":"2021-12-31","val":1000,"accn":"0001140361-22-019248","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-16"},{"end":"2021-12-31","val":1000,"accn":"0001140361-22-029555","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-15"},{"end":"2021-12-31","val":1000,"accn":"0001140361-22-041167","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":1000,"accn":"0001140361-23-014658","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":1000,"accn":"0001140361-22-019248","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-16","frame":"CY2022Q1I"},{"end":"2022-06-30","val":1000,"accn":"0001140361-22-029555","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-15","frame":"CY2022Q2I"},{"end":"2022-09-30","val":1000,"accn":"0001140361-22-041167","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":1000,"accn":"0001140361-23-014658","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":1000,"accn":"0001140361-23-024499","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-15"},{"end":"2022-12-31","val":1000,"accn":"0001140361-23-039411","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":1000,"accn":"0001140361-23-052729","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-13"},{"end":"2022-12-31","val":1000,"accn":"0001140361-24-016452","fy":2023,"fp":"FY","form":"10-K","filed":"2024-03-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":1000,"accn":"0001140361-23-024499","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-15","frame":"CY2023Q1I"},{"end":"2023-06-30","val":1000,"accn":"0001140361-23-039411","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":1000,"accn":"0001140361-23-052729","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-13","frame":"CY2023Q3I"},{"end":"2023-12-31","val":1000,"accn":"0001140361-24-016452","fy":2023,"fp":"FY","form":"10-K","filed":"2024-03-29"},{"end":"2023-12-31","val":1000,"accn":"0001140361-24-026105","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-15"},{"end":"2023-12-31","val":1000,"accn":"0001140361-24-036937","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-13"},{"end":"2023-12-31","val":1000,"accn":"0001140361-24-046726","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":1000,"accn":"0001140361-25-011169","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":1000,"accn":"0001140361-24-026105","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-15","frame":"CY2024Q1I"},{"end":"2024-06-30","val":1000,"accn":"0001140361-24-036937","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-13","frame":"CY2024Q2I"},{"end":"2024-09-30","val":1000,"accn":"0001140361-24-046726","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":1000,"accn":"0001140361-25-011169","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":1000,"accn":"0001140361-25-019149","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-15"},{"end":"2024-12-31","val":1000,"accn":"0001140361-25-031039","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-14"},{"end":"2024-12-31","val":1000,"accn":"0001140361-25-042116","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"end":"2024-12-31","val":1000,"accn":"0001140361-26-012155","fy":2025,"fp":"FY","form":"10-K","filed":"2026-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":1000,"accn":"0001140361-25-019149","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-15","frame":"CY2025Q1I"},{"end":"2025-06-30","val":1000,"accn":"0001140361-25-031039","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-14","frame":"CY2025Q2I"},{"end":"2025-09-30","val":1000,"accn":"0001140361-25-042116","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"},{"end":"2025-12-31","val":1000,"accn":"0001140361-26-012155","fy":2025,"fp":"FY","form":"10-K","filed":"2026-03-31"},{"end":"2025-12-31","val":1000,"accn":"0001140361-26-021495","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-15","frame":"CY2025Q4I"},{"end":"2026-03-31","val":1000,"accn":"0001140361-26-021495","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-15","frame":"CY2026Q1I"}]}},"TemporaryEquitySharesIssued":{"label":"Temporary Equity, Shares Issued","description":"The number of securities classified as temporary equity that have been sold (or granted) to the entity's shareholders. Securities issued include securities outstanding and securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.","units":{"shares":[{"end":"2020-12-31","val":176,"accn":"0001140361-21-037756","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15"},{"end":"2020-12-31","val":176,"accn":"0001140361-22-012058","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-31","frame":"CY2020Q4I"},{"end":"2021-09-30","val":176,"accn":"0001140361-21-037756","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-15","frame":"CY2021Q3I"},{"end":"2021-12-31","val":176,"accn":"0001140361-22-012058","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-31"},{"end":"2021-12-31","val":176,"accn":"0001140361-22-019248","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-16"},{"end":"2021-12-31","val":176,"accn":"0001140361-22-029555","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-15"},{"end":"2021-12-31","val":176,"accn":"0001140361-22-041167","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14"},{"end":"2021-12-31","val":176,"accn":"0001140361-23-014658","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30","frame":"CY2021Q4I"},{"end":"2022-03-31","val":176,"accn":"0001140361-22-019248","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-16","frame":"CY2022Q1I"},{"end":"2022-06-30","val":176,"accn":"0001140361-22-029555","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-15","frame":"CY2022Q2I"},{"end":"2022-09-30","val":176,"accn":"0001140361-22-041167","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-14","frame":"CY2022Q3I"},{"end":"2022-12-31","val":176,"accn":"0001140361-23-014658","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-30"},{"end":"2022-12-31","val":176,"accn":"0001140361-23-024499","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-15"},{"end":"2022-12-31","val":176,"accn":"0001140361-23-039411","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14"},{"end":"2022-12-31","val":176,"accn":"0001140361-23-052729","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-13"},{"end":"2022-12-31","val":176,"accn":"0001140361-24-016452","fy":2023,"fp":"FY","form":"10-K","filed":"2024-03-29","frame":"CY2022Q4I"},{"end":"2023-03-31","val":176,"accn":"0001140361-23-024499","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-15","frame":"CY2023Q1I"},{"end":"2023-06-30","val":176,"accn":"0001140361-23-039411","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-14","frame":"CY2023Q2I"},{"end":"2023-09-30","val":176,"accn":"0001140361-23-052729","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-13","frame":"CY2023Q3I"},{"end":"2023-12-31","val":176,"accn":"0001140361-24-016452","fy":2023,"fp":"FY","form":"10-K","filed":"2024-03-29"},{"end":"2023-12-31","val":176,"accn":"0001140361-24-026105","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-15"},{"end":"2023-12-31","val":176,"accn":"0001140361-24-036937","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-13"},{"end":"2023-12-31","val":176,"accn":"0001140361-24-046726","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14"},{"end":"2023-12-31","val":176,"accn":"0001140361-25-011169","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31","frame":"CY2023Q4I"},{"end":"2024-03-31","val":176,"accn":"0001140361-24-026105","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-15","frame":"CY2024Q1I"},{"end":"2024-06-30","val":176,"accn":"0001140361-24-036937","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-13","frame":"CY2024Q2I"},{"end":"2024-09-30","val":176,"accn":"0001140361-24-046726","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-14","frame":"CY2024Q3I"},{"end":"2024-12-31","val":176,"accn":"0001140361-25-011169","fy":2024,"fp":"FY","form":"10-K","filed":"2025-03-31"},{"end":"2024-12-31","val":176,"accn":"0001140361-25-019149","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-15"},{"end":"2024-12-31","val":176,"accn":"0001140361-25-031039","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-14"},{"end":"2024-12-31","val":176,"accn":"0001140361-25-042116","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14"},{"end":"2024-12-31","val":176,"accn":"0001140361-26-012155","fy":2025,"fp":"FY","form":"10-K","filed":"2026-03-31","frame":"CY2024Q4I"},{"end":"2025-03-31","val":176,"accn":"0001140361-25-019149","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-15","frame":"CY2025Q1I"},{"end":"2025-06-30","val":176,"accn":"0001140361-25-031039","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-14","frame":"CY2025Q2I"},{"end":"2025-09-30","val":176,"accn":"0001140361-25-042116","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-14","frame":"CY2025Q3I"},{"end":"2025-12-31","val":176,"accn":"0001140361-26-012155","fy":2025,"fp":"FY","form":"10-K","filed":"2026-03-31"},{"end":"2025-12-31","val":176,"accn":"0001140361-26-021495","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-15","frame":"CY2025Q4I"},{"end":"2026-03-31","val":176,"accn":"0001140361-26-021495","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-15","frame":"CY2026Q1I"}]}},"TemporaryEquitySharesOutstanding":{"label":"Temporary Equity, Shares Outstanding","description":"The number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. 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