| Group [member] | Company [member] | ||
| Non-current employee benefit liabilities [abstract] | |||
| Cash-settled share-based payment liability | |||
| Retirement benefits | |||
| Employment termination benefits | |||
| Provision for unconsumed leave | |||
| Defined contribution plan | |||
| Defined benefit plan | |||
| Other non-current employee benefit liabilities | |||
| Total non-current employee benefit liabilities | |||