Subsequent events - Additional Information (Detail) $ in Millions, ¥ in Billions |
May 29, 2026
shares
|
May 08, 2026
JPY (¥)
shares
|
May 31, 2026
USD ($)
|
|---|---|---|---|
| Shares Repurchased [Member] | |||
| Disclosure of non-adjusting events after reporting period [line items] | |||
| Number of shares for repurchase | shares | 230,000,000 | ||
| Total purchase price for repurchase | ¥ | ¥ 500 | ||
| Period of repurchase start date | May 11, 2026 | ||
| Period of repurchase end date | May 10, 2027 | ||
| Share Cancellation [Member] | |||
| Disclosure of non-adjusting events after reporting period [line items] | |||
| Number of shares cancelled | shares | 184,494,319 | ||
| Stock cancellation date | May 29, 2026 | ||
| Asset Purchase [Member] | |||
| Disclosure of non-adjusting events after reporting period [line items] | |||
| Percentage of voting equity interests acquired | 100.00% | ||
| Cash transferred | $ 1,600.0 | ||
| Long Term Debt Recognised As Of Acquisition Date | 1,900.0 | ||
| Non-controlling interest as of acquisition | 400.0 | ||
| Content assets recognised as of acquisition | $ 3.4 |