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Equity-based compensation - Summary of information of options outstanding (Details) shares in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 $ / shares | Dec. 31, 2018 shares $ / shares | Dec. 31, 2017 shares $ / shares
Novartis equity plan select, outside North America [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share options outstanding in share-based payment arrangement (in shares) | shares |  | 426 | 500
Weighted average remaining contractual life of outstanding share options |  | 3 years 3 months 18 days |
Options outstanding, weighted average exercise price (in dollars per share) |  | $ 61.4 | $ 61.1
Novartis equity plan select, outside North America [member] | Exercise Price Range, 45-55 [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share options outstanding in share-based payment arrangement (in shares) | shares |  | 32 |
Weighted average remaining contractual life of outstanding share options |  | 21 days |
Options outstanding, weighted average exercise price (in dollars per share) |  | $ 52.4 |
Novartis equity plan select, outside North America [member] | Exercise Price Range, 45-55 [member] | Minimum [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Exercise price, share options granted (in dollars per share) | $ 45 |  |
Novartis equity plan select, outside North America [member] | Exercise Price Range, 45-55 [member] | Maximum [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Exercise price, share options granted (in dollars per share) | 55 |  |
Novartis equity plan select, outside North America [member] | Exercise Price Range, 56-66 [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share options outstanding in share-based payment arrangement (in shares) | shares |  | 394 |
Weighted average remaining contractual life of outstanding share options |  | 3 years 6 months |
Options outstanding, weighted average exercise price (in dollars per share) |  | $ 62.1 |
Novartis equity plan select, outside North America [member] | Exercise Price Range, 56-66 [member] | Minimum [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Exercise price, share options granted (in dollars per share) | 56 |  |
Novartis equity plan select, outside North America [member] | Exercise Price Range, 56-66 [member] | Maximum [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Exercise price, share options granted (in dollars per share) | 66 |  |
Novartis equity plan select, North America [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share options outstanding in share-based payment arrangement (in shares) | shares |  | 1,288 | 1,800
Weighted average remaining contractual life of outstanding share options |  | 3 years 6 months |
Options outstanding, weighted average exercise price (in dollars per share) |  | $ 62.6 | $ 62.5
Novartis equity plan select, North America [member] | Exercise Price Range, 45-55 [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share options outstanding in share-based payment arrangement (in shares) | shares |  | 30 |
Weighted average remaining contractual life of outstanding share options |  | 18 days |
Options outstanding, weighted average exercise price (in dollars per share) |  | $ 50.7 |
Novartis equity plan select, North America [member] | Exercise Price Range, 45-55 [member] | Minimum [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Exercise price, share options granted (in dollars per share) | 45 |  |
Novartis equity plan select, North America [member] | Exercise Price Range, 45-55 [member] | Maximum [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Exercise price, share options granted (in dollars per share) | 55 |  |
Novartis equity plan select, North America [member] | Exercise Price Range, 56-66 [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share options outstanding in share-based payment arrangement (in shares) | shares |  | 1,258 |
Weighted average remaining contractual life of outstanding share options |  | 3 years 7 months 6 days |
Options outstanding, weighted average exercise price (in dollars per share) |  | $ 62.9 |
Novartis equity plan select, North America [member] | Exercise Price Range, 56-66 [member] | Minimum [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Exercise price, share options granted (in dollars per share) | 56 |  |
Novartis equity plan select, North America [member] | Exercise Price Range, 56-66 [member] | Maximum [member] |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Exercise price, share options granted (in dollars per share) | $ 66 |  |

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