Share based compensation reserve - Director and Senior Management Share Awards (Narrative) (Details) $ / shares in Units, € in Millions, $ in Millions | | | | | | 1 Months Ended | 3 Months Ended | | | | | | | |
Mar. 01, 2024 shares $ / shares | Jan. 01, 2024 USD ($) shares | Feb. 01, 2023 shares $ / shares | Jan. 01, 2023 USD ($) shares $ / shares | Jan. 01, 2022 USD ($) shares | Jan. 31, 2021 shares | Mar. 31, 2024 USD ($) shares $ / shares | Mar. 31, 2024 EUR (€) shares | Mar. 31, 2023 EUR (€) shares | Jan. 01, 2024 EUR (€) | Dec. 31, 2023 $ / shares | Jan. 01, 2023 EUR (€) | Dec. 31, 2022 $ / shares | Jan. 01, 2022 EUR (€) | Dec. 31, 2021 $ / shares | Jan. 01, 2021 USD ($) | Jan. 01, 2021 EUR (€) |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Key management personnel compensation | € | | | | | | | | € 3 | € 12.2 | | | | | | | | |
Ordinary shares | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Shares issued, price per share (in dollars per share) | $ / shares | | | | | | | $ 17.31 | | | | $ 16.33 | | $ 26.23 | | $ 24.5 | | |
January 1, 2021 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Weighted average fair value at measurement date, other equity instruments granted | | | | | | | | | | | | | | | | $ 16 | € 15.1 |
January 1, 2022 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Weighted average fair value at measurement date, other equity instruments granted | | | | | $ 19 | | | | | | | | | € 17.9 | | | |
Other Awards | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Weighted average fair value at measurement date, other equity instruments granted | | | | $ 3.8 | | | | | | | | € 3.4 | | | | | |
January 1, 2023 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Weighted average fair value at measurement date, other equity instruments granted | | $ 8.8 | | $ 7.5 | | | | | | € 8 | | € 7 | | | | | |
Restricted shares | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Number of other equity instruments exercised or vested in share-based payment arrangement (in shares) | | | | | | | | | 761,544 | | | | | | | | |
New awards granted in the period (in shares) | | | | | | | 1,112,460 | 1,112,460 | | | | | | | | | |
New awards granted in the period (in shares) | | | | | | | 1,112,460 | 1,112,460 | | | | | | | | | |
Restricted shares | Management Award 2019 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Number of other equity instruments exercised or vested in share-based payment arrangement (in shares) | | | | 152,695 | | | | | | | | | | | | | |
Liabilities from share-based payment transactions (in shares) | | | | 73,120 | | | | | | | | | | | | | |
Shares issued, price per share (in dollars per share) | $ / shares | | | | $ 17.24 | | | | | | | | | | | | | |
Restricted shares | Management Award 2019 | Ordinary shares | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Number of other equity instruments exercised or vested in share-based payment arrangement (in shares) | | | | 79,575 | | | | | | | | | | | | | |
Restricted shares | Management Award 2020 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Number of other equity instruments exercised or vested in share-based payment arrangement (in shares) | | | 414,859 | | | | | | | | | | | | | | |
Liabilities from share-based payment transactions (in shares) | | | 192,079 | | | | | | | | | | | | | | |
Shares issued, price per share (in dollars per share) | $ / shares | | | $ 17.77 | | | | | | | | | | | | | | |
Restricted shares | Management Award 2020 | Ordinary shares | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Number of other equity instruments exercised or vested in share-based payment arrangement (in shares) | 256,687 | | 222,780 | | | | | | | | | | | | | | |
Restricted shares | January 1, 2018 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Number of other equity instruments exercised or vested in share-based payment arrangement (in shares) | | | | 193,990 | | | | | | | | | | | | | |
Liabilities from share-based payment transactions (in shares) | | | | 83,209 | | | | | | | | | | | | | |
Shares issued, price per share (in dollars per share) | $ / shares | | | | $ 17.24 | | | | | | | | | | | | | |
Restricted shares | January 1, 2018 | Ordinary shares | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Number of other equity instruments exercised or vested in share-based payment arrangement (in shares) | | | | 110,781 | | | | | | | | | | | | | |
Restricted shares | January 1, 2021 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Award vesting period | | | | | | | 3 years | 3 years | | | | | | | | | |
EBITDA and cumulative net sales tranches as percent of total award | | | | | | | | | | | | | | | | 3,750% | 3,750% |
Share price tranche as percent of total award | | | | | | | | | | | | | | | | 2,500% | 2,500% |
Incremental fair value granted, modified share-based payment arrangements | | | | | | | $ 9 | € 8.5 | | | | | | | | | |
New awards granted in the period (in shares) | | | | | | 820,202 | | | | | | | | | | | |
New awards granted in the period (in shares) | | | | | | 820,202 | | | | | | | | | | | |
Restricted shares | January 1, 2022 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Incremental fair value granted, modified share-based payment arrangements | | | | | | | $ 11.4 | € 10.8 | | | | | | | | | |
New awards granted in the period (in shares) | | | | | 1,140,518 | | | | | | | | | | | | |
New awards granted in the period (in shares) | | | | | 1,140,518 | | | | | | | | | | | | |
Restricted shares | January 1, 2023 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
New awards granted in the period (in shares) | | | | 1,209,137 | | | | | | | | | | | | | |
New awards granted in the period (in shares) | | | | 1,209,137 | | | | | | | | | | | | | |
Restricted shares | Other Awards | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
New awards granted in the period (in shares) | | | | 87,000 | | | | | | | | | | | | | |
New awards granted in the period (in shares) | | | | 87,000 | | | | | | | | | | | | | |
Restricted shares | January 1, 2024 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
New awards granted in the period (in shares) | | 1,112,460 | | | | | | | | | | | | | | | |
New awards granted in the period (in shares) | | 1,112,460 | | | | | | | | | | | | | | | |
Restricted shares | Management Award 2021 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Number of other equity instruments exercised or vested in share-based payment arrangement (in shares) | 476,552 | | | | | | | | | | | | | | | | |
Liabilities from share-based payment transactions (in shares) | 219,865 | | | | | | | | | | | | | | | | |
Shares issued, price per share (in dollars per share) | $ / shares | $ 18.89 | | | | | | | | | | | | | | | | |
Restricted shares | January 1, 2018 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Number of other equity instruments exercised or vested in share-based payment arrangement (in shares) | | | | | | | | | 193,990 | | | | | | | | |
Restricted shares | January 1, 2020 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Number of other equity instruments exercised or vested in share-based payment arrangement (in shares) | | | | | | | | | 414,859 | | | | | | | | |
Restricted shares | January 1, 2021 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Number of other equity instruments exercised or vested in share-based payment arrangement (in shares) | | | | | | | | | 0 | | | | | | | | |
New awards granted in the period (in shares) | | | | | | | 0 | 0 | | | | | | | | | |
New awards granted in the period (in shares) | | | | | | | 0 | 0 | | | | | | | | | |
Restricted shares | January 1, 2022 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Number of other equity instruments exercised or vested in share-based payment arrangement (in shares) | | | | | | | | | 0 | | | | | | | | |
New awards granted in the period (in shares) | | | | | | | 0 | 0 | | | | | | | | | |
New awards granted in the period (in shares) | | | | | | | 0 | 0 | | | | | | | | | |
Restricted shares | Other Awards | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
Number of other equity instruments exercised or vested in share-based payment arrangement (in shares) | | | | | | | | | 0 | | | | | | | | |
New awards granted in the period (in shares) | | | | | | | 0 | 0 | | | | | | | | | |
New awards granted in the period (in shares) | | | | | | | 0 | 0 | | | | | | | | | |
Restricted shares | January 1, 2023 | | | | | | | | | | | | | | | | | |
Disclosure of terms and conditions of share-based payment arrangement [line items] | | | | | | | | | | | | | | | | | |
New awards granted in the period (in shares) | | | | | | | 0 | 0 | | | | | | | | | |
New awards granted in the period (in shares) | | | | | | | 0 | 0 | | | | | | | | | |