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Share-based Compensation - Nio Incentive Plans - Text and Options (Details) $ / shares in Units, ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2022 CNY (¥) shares | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 CNY (¥) shares | Dec. 31, 2021 USD ($) $ / shares | Dec. 31, 2020 CNY (¥) shares | Dec. 31, 2020 USD ($) $ / shares | Dec. 31, 2019 USD ($) $ / shares shares
Number of Options Outstanding |  |  |  |  |  |  |
Outstanding, Beginning Balance | shares | 70,497,950 |  | 79,318,499 |  | 88,843,972 |  |
Granted | shares | 1,685,000 |  | 2,468,150 |  | 16,077,700 |  |
Exercised | shares | (4,533,690) |  | (9,119,048) |  | (15,253,500) |  |
Forfeited | shares | (1,197,777) |  | (2,143,711) |  | (9,030,781) |  |
Expired | shares | (467,608) |  | (25,940) |  | (1,318,892) |  |
Outstanding, Ending Balance | shares | 65,983,875 |  | 70,497,950 |  | 79,318,499 |  | 88,843,972
Vested and expected to vest | shares |  | 65,832,596 |  |  |  |  |
Exercisable | shares |  | 55,898,588 |  |  |  |  |
Weighted Average Exercise Price, Options |  |  |  |  |  |  |
Outstanding, Beginning Balance |  | $ 4.76 |  | $ 3.59 |  | $ 2.38 |
Granted |  | 3.03 |  | 13.89 |  | 8.09 |
Exercised |  | 2.58 |  | 2.31 |  | 1.55 |
Forfeited |  | 10.76 |  | 12.59 |  | 3.02 |
Expired |  | 12.03 |  | 19.03 |  | 4.49 |
Outstanding, Ending Balance |  | 3.57 |  | $ 4.76 |  | $ 3.59 | $ 2.38
Vested and expected to vest |  | 3.56 |  |  |  |  |
Exercisable |  | $ 3.22 |  |  |  |  |
Weighted Average Remaining Contractual Life, Outstanding, Options | 4 years 6 months 3 days |  | 5 years 5 months 8 days |  | 6 years 4 months 20 days |  | 6 years 9 months 7 days
Weighted Average Remaining Contractual Life, Options, Vested and expected to vest | 4 years 6 months 3 days |  |  |  |  |  |
Weighted Average Remaining Contractual Life, Options, Exercisable | 4 years 5 months 26 days |  |  |  |  |  |
Aggregate Intrinsic Value, Outstanding, Options | $ |  | $ 465,353 |  | $ 1,944,597 |  | $ 3,581,119 |
Aggregate Intrinsic Value, Vested and expected to vest, Options | $ |  | 464,324 |  |  |  |  |
Aggregate Intrinsic Value, Exercisable, Options | $ |  | $ 396,734 |  |  |  |  |
Weighted-average grant date fair value for options granted |  | $ 19.27 |  | $ 33.54 |  | $ 4.03 |
Recognized share-based compensation expenses | ¥ | ¥ 2,295,896 |  | ¥ 1,010,140 |  | ¥ 187,094 |  |
Nio Incentive Plan 2015 |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |
Expiration period | 10 years |  |  |  |  |  |
Requisite service period | 4 years |  |  |  |  |  |
Nio Incentive Plan 2015 | Tranche one |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |
Vesting percentage | 25.00% |  |  |  |  |  |
Nio Incentive Plan 2015 | Tranche two |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |
Vesting period | 36 months |  |  |  |  |  |
Vesting percentage | 75.00% |  |  |  |  |  |
Nio Incentive Plan 2016 |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |
Expiration period | 7 years |  |  |  |  |  |
Requisite service period | 4 years |  |  |  |  |  |
Nio Incentive Plan 2017 |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |
Expiration period | 10 years |  |  |  |  |  |
Requisite service period | 5 years |  |  |  |  |  |
Options |  |  |  |  |  |  |
Weighted Average Exercise Price, Options |  |  |  |  |  |  |
Aggregate Intrinsic Value, Outstanding, Options | $ |  |  |  |  |  |  | $ 164,363
Options | NIO Incentive Plans |  |  |  |  |  |  |
Weighted Average Exercise Price, Options |  |  |  |  |  |  |
Recognized share-based compensation expenses | ¥ | ¥ 379,178 |  | ¥ 534,641 |  | ¥ 177,543 |  |

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