Accounting Policies - Investments in Associates and Joint Ventures (Details)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
UH II.
Corporate information:
Ownership interest in associate	35.50%	35.90%

The proportion of ownership interest in an associate attributable to the entity. [Refer: Associates [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration