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Share Repurchase Programs (Details) ¥ in Thousands, $ in Millions | 1 Months Ended | 4 Months Ended | 10 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 31, 2021 USD ($) | Feb. 28, 2021 USD ($) | Feb. 29, 2020 USD ($) | Nov. 30, 2019 USD ($) | Nov. 30, 2018 USD ($) | Dec. 31, 2021 USD ($) shares | Dec. 31, 2021 USD ($) shares | Dec. 31, 2021 CNY (¥) | Feb. 28, 2021 USD ($) shares | Dec. 31, 2020 CNY (¥) | Nov. 30, 2020 USD ($) shares | Dec. 31, 2019 CNY (¥) | Nov. 30, 2019 USD ($) shares | May 19, 2020 USD ($)
Share repurchases |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of shares repurchased | ¥ |  |  |  |  |  |  |  | ¥ 12,770,301 |  | ¥ 11,273,814 |  | ¥ 1,467 |  |
American Depositary Shares | 2018 share repurchase program |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchases |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized amount |  |  |  |  | $ 1,000.0 |  |  |  |  |  |  |  |  |
Share repurchase program period, maximum |  |  |  |  | 12 months |  |  |  |  |  |  |  |  |
Shares repurchased (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 5,075 |
Value of shares repurchased |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.2 |
American Depositary Shares | 2019 share repurchase program | Youdao |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchases |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized amount |  |  |  | $ 20.0 |  |  |  |  |  |  |  |  | $ 20.0 |
Share repurchase program period, maximum |  |  |  | 12 months |  |  |  |  |  |  |  |  |  |
Shares repurchased (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 198,000 |  |  |
Value of shares repurchased |  |  |  |  |  |  |  |  |  |  | $ 3.4 |  |  |
American Depositary Shares | 2020 share repurchase program |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchases |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized amount |  |  | $ 1,000.0 |  |  |  |  |  |  |  |  |  |  |
Share repurchase program period, maximum |  |  | 12 months |  |  |  |  |  |  |  |  |  |  |
Shares repurchased (in shares) | shares |  |  |  |  |  |  |  |  | 22,800,000 |  |  |  |  |
Value of shares repurchased |  |  |  |  |  |  |  |  | $ 1,820.1 |  |  |  |  |
Additional authorized amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000.0
American Depositary Shares | 2021 share repurchase program |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchases |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized amount | $ 3,000.0 | $ 2,000.0 |  |  |  |  |  |  | $ 2,000.0 |  |  |  |  |
Share repurchase program period, maximum |  | 24 months |  |  |  |  |  |  |  |  |  |  |  |
Shares repurchased (in shares) | shares |  |  |  |  |  |  | 18,500,000 |  |  |  |  |  |  |
Value of shares repurchased |  |  |  |  |  |  | $ 1,779.1 |  |  |  |  |  |  |
American Depositary Shares | 2021 share repurchase program | Youdao |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchases |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized amount | $ 50.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase program period, maximum | 36 months |  |  |  |  |  |  |  |  |  |  |  |  |
Shares repurchased (in shares) | shares |  |  |  |  |  | 600,000 |  |  |  |  |  |  |  |
Value of shares repurchased |  |  |  |  |  | $ 8.2 |  |  |  |  |  |  |  |
Ordinary shares | 2018 share repurchase program |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchases |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares repurchased (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 25,375 |
Ordinary shares | 2020 share repurchase program |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchases |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares repurchased (in shares) | shares |  |  |  |  |  |  |  |  | 114,000,000.0 |  |  |  |  |
Ordinary shares | 2021 share repurchase program |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchases |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares repurchased (in shares) | shares |  |  |  |  |  |  | 92,400,000 |  |  |  |  |  |  |

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