Common stock (Detail) |
6 Months Ended |
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Jun. 30, 2025
shares
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| Class A [Member] | |
| Class of Stock [Line Items] | |
| Shares issued, beginning balance | 623,902 |
| Treasury shares, beginning balance | (76,340) |
| Shares outstanding, beginning balance | 547,562 |
| Conversions of Class A to Class B common stock | (16,093) |
| Conversions of Class A to Class B common stock, Outstanding | (16,093) |
| Shares issued, ending balance | 607,809 |
| Treasury shares, ending balance | (76,340) |
| Shares outstanding, ending balance | 531,469 |
| Class B [Member] | |
| Class of Stock [Line Items] | |
| Shares issued, beginning balance | 1,551,291,352 |
| Treasury shares, beginning balance | (215,299,213) |
| Shares outstanding, beginning balance | 1,335,992,139 |
| Conversions of Class A to Class B common stock | 24,139,500 |
| Conversions of Class A to Class B common stock, Outstanding | 24,139,500 |
| Shares issued, ending balance | 1,575,430,852 |
| Treasury shares, ending balance | (215,299,213) |
| Shares outstanding, ending balance | 1,360,131,639 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of previously issued common shares repurchased by the issuing entity and held in treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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