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v3.20.4

Selected accounting policies - Schedule of useful lives of intangible assets (Details) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2020
Currently marketed products [member] | Bottom of range [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Finite-lived intangible asset, useful life |  |  | 5 years
Currently marketed products [member] | Top of range [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Finite-lived intangible asset, useful life |  |  | 20 years
Marketing know-how [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Finite-lived intangible asset, useful life |  |  | 25 years
Technologies [member] | Bottom of range [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Finite-lived intangible asset, useful life |  |  | 10 years
Technologies [member] | Top of range [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Finite-lived intangible asset, useful life |  |  | 20 years
Other intangible assets (including software) [member] | Bottom of range [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Finite-lived intangible asset, useful life | 3 years | 3 years | 3 years
Other intangible assets (including software) [member] | Top of range [member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Finite-lived intangible asset, useful life | 10 years | 7 years | 10 years

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- Definition Useful Lives Or Amortisation Rates, Intangible Assets Other Than Goodwill, Period + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Period Type: |